The majority of online shoppers who use coupons are missing out on savings by using invalid or expired coupons, according to a new report commissioned by Coupon Craze and conducted by Harris Interactive.

The majority (94%) of online shoppers have had an expired or invalid coupon code but more than half (57%) have continued with their purchase despite not being able to use the coupon.

According to comScore, over 63 million people in the US use the mobile Internet, with 35% of those people accessing it on a daily basis. eMarketer says that over 70 million US mobile phone users will access the Internet from their device in 2009.

eMarketer also says that mobile e-commerce is still in its infancy though. While some retailers are ahead of the game, many are still "watching from the sidelines," and planning their mobile commerce strategies.

Google has introduced some new policies for marketplaces and aggregators on Google Product Search. They have also introduced multi-client accounts to help aggregators and marketplaces manage feeds for multiple sellers under a single account.

Over the years, Walmart has been widely criticized in some circles for essentially stamping out small businesses across America with its ever-expanding presence. There have even been documentaries made about this. But that’s about the offline world right?

Walmart has now introduced "The Walmart Marketplace," a new online initiative, in which it bolsters its inventory by partnering with other online retailers with large inventories themselves.

Earlier this month comScore released its Q2 retail e-commerce sales estimates, which indicated that US online retail spending dropped from the same period from last year. This is only the second time that has happened.

eBay upset a lot of its sellers over the last year and a half or so with various announcements and policy changes. Evidence of this is all over the web on message boards, blog comments, and social networks.

Update: eBay is starting to test the badges. The company made the following announcement:

Over the next few weeks you may see a new seller badge appearing on some item pages and in search results. This badge is part of the new eBay Top-rated seller status announced last week and launching in October. Starting this week and over the next few weeks, we’ll be testing the badge in search results and item pages for a small percentage of eBay traffic.

Facebook is reportedly planning on expanding its staff by up to 50% this year. CEO Mark Zuckerberg delivered this news to Bloomberg, saying the economy has provided a "great environment" for them, because nobody else has been hiring.

Facebook is set to begin testing an expansion of its Gift Shop, for third-party developers to begin selling items to users for Facebook’s virtual currency. The really interesting part about this is that these developers can sell physical merchandise, not just Facebook gifts.

Hitwise is sharing some information about how well Bing Shopping is doing. They have compared its performance from the week ending June 6th, just after its launch to its performance for the week ending August 8.

eBay has announced "Quality Click Pricing" for the eBay Partner Network affiliate program. The company describes this as a new payout structure designed to further reward affiliates who drive incremental transactions on eBay, and who send "value buyers" to the company’s sites.

Compete puts together a monthly ranking of the top 250 Web sites in the US, based on unique visitors, and breaks up the data by relevant categories and behavioral segments. In its latest report, Compete found that the top performers for July fell into four main categories: auto manufacturers that were part of the "Cash for Clunkers" deal, summer blockbuster movie sites, back-to-school shopping sites and social media news aggregates (like Digg or Tweetmeme).

eBay has announced Selling Manager Applications, a directory of apps for eBay sellers to use to improve their customer service, streamline shipping, and make their businesses more efficient.

Sellers can use these apps if they are subscribed to Selling Manager or Selling Manager Pro. Regular Selling Manager is free. Any apps the seller subscribes to will appear under the Applications tab in their version of Selling Manager.

Mobile devices these days are often smaller, thinner, and lighter, but are able to deliver a plethora of content. WebProNews spoke with Gal Salomon, CEO and Founder of security firm Discretix, about embedded security and security concerns that come along with an industry of smarter phones.

WebProNews: Please tell us a little bit about what mobile embedded security is.

Interesting data from Hitwise indicates that content-driven websites get a whole lot more traffic than transactional-based ones. To put a number on it, that would be 73% more.

Robin Goad of Hitwise shares the following graph comparing sites in the Shopping and Classifieds, Business and Finance, Travel, Entertainment, Computes and Internet -Social networking and Forums, News and Media, and Lifestyle categories. This is in the UK, mind you.

Google announced today that NetSuite is now a featured partner of Google Checkout. This means that NetSuite users can now offer Google Checkout as one of their payment options.

comScore has released its Q2 retail eComerce sales estimates, which indicate that US online retail spending totaled $30.2 billion, which is 1% less than the same period last year. This is only the 2nd time eCommerce spending has been lower for the same quarter than the previous year.

It doesn’t look like too many people plan to do their back-to-school shopping online. eMarketer looks at a combination of studies from BIGresearch and the National Retail Federation, Deloitte, and OfficeMax. These studies paint similar pictures, and they just don’t show too many intentions from parents to turn to the web as the school year draws near.

A sizable company has embraced Facebook in a potentially game-changing way.  Today marks the debut of an eCommerce store inside 1-800-Flowers.com’s Facebook Page, and said store is the first of its kind.

The American Jewish Committee filed a lawsuit Friday against Amazon-Germany for selling books it says question the Holocaust and "trivialize" the Nazis.

The AJC says there are about 50 titles available on Amazon.de that question the Holocaust and promote Nazis.

PayPal announced that it is opening an API to developers to allow them to embed PayPal’s payment system into their own apps and platforms. The company, a subsidiary of eBay, says this is the first global payment platform to open to third-party developers.