Update: A Facebook spokesperson tells WebProNews, "This error isn’t specific to any one account.  It’s generated when a person has been blocked a certain large number of times.  In very rare instances, a viral campaign will develop instructing lots of people to all wrongly block the same person. The purpose of this system is to protect the experience for people targeted by these campaigns.  We’re constantly working to improve our systems and are taking a closer look at this one."

LinkedIn has announced the launch of LinkedIn for iPhone version 3.2, which the company says makes it easier to stay up to date and find important changes happening in your professional network.

The app comes with some changes to how LinkedIn displays profile updates from connections. You can see more info about what changed from All Updates or Profiles.

Facebook Places is going to be huge for businesses. It already is. You’ve probably been hearing about all of the opportunities that come with check-in apps like Foursquare, Gowalla, etc. Facebook has half a billion users. This takes things to a whole new level.

Word around the Web is that Facebook will be announcing its long-awaited location feature today. While this has still not been confirmed, a mysterious account appeared on Twitter today, for @FacebookPlaces.

Twitter announced a new feature today called "Twitter Tales". This is just a section to highlight stories from Twitter users about interesting uses of the service.

The official description is: "How do you use Twitter? We asked dozens of our users that exact question. What resulted from their responses is a series of quirky and inspiring articles. We call them Twitter Tales."

Many Facebook users have long awaited the arrival of a "dislike" button for status updates that they find dumb, repulsive, or just annoying. If you happen to see someone on the social network claiming to have found one, however, don’t buy it. It’s a scam.

comScore released its Video Metrix data for July today. According to this, 178 million people in the U.S. watched online video content during the month, watching an average of 14.7 hours per user.

During the month, Facebook moved up from the fourth position to the third position behind Yahoo properties, and of course Google properties at number 1. Facebook accounted for 46.6 million viewers.

LinkedIn has launched a couple new features for LinkedIn Recruiter, aimed at making it easier to manage projects and talent. They have added one-page project management and the ability to set reminders on profiles.

According to a report from Kara Swisher at Boomtown, Facebook has acquired a company called Chai Labs, though this has yet to be confirmed by either company. Also not confirmed is the price, but it is estimated to be somewhere in the neighborhood of $10 million.

Swisher speculates that the acquisition is more focused on acquiring talent, which would certainly fall in line with past Facebook acquisitions.

LinkedIn has launched some improvements to how groups are moderated. There are six basic changes.

Group managers can now delete threads directly. This helps them actively fight spam by deleting content from the "more" tab in the thread.

Update 2: The issue is reportedly resolved.

Update: Facebook is already fixing the issue. AllFacebook got a statement from the company saying: 

Facebook is launching a new live video cahnnel today called Facebook Live. This is the company’s official live channel, broadcasting from Facebook Headquarters in Palo Alto.

"Facebook Live will provide a deeper, more interactive look into what’s happening at Facebook," a representative for the company tells WebProNews.

Twitter has launched its official Tweet button for publishers to place on their content. There are numerous unofficial buttons out there that publishers have been taking advantage of for quite a while, but now there’s one right from the company that counts tweets no matter how they were tweeted.

Actually, Twitter is working with TweetMeme on this one. TweetMeme has been offering probably the most popular version of the tweet button for publishers. Twitter says TweetMeme will be switching over to the official Twitter button anyway.

MySpace has a new design for the user home page, which is available today on an opt-in basis, but should be rolled out completely by August 19th.

MySpace tells WebProNews, "The new user homepage prominently displays the activity stream and simplifies the content discovery experience.  As users log-in to MySpace, there is a prompt to opt-in for an early look at the new homepage."

A couple weeks ago, Amazon launched a new feature that lets users tap into their Facebook network. Users can find recommendations from friends, see upcoming birthdays and their friends’ wishlists, find gift ideas based on Facebook profiles or get purchase ideas from profiles based on friends with similar interests. This has the potential to be very powerful, and might in fact be indicative of how social media will drive e-commerce going forward. 

According to research from Experian Hitwise, Facebook accounts for one in six page views in the UK. It’s the second most visited site.

In July, Facebook made up 7.14% of all UK Internet visits, according to the firm. It accounted for over half (54.48%) of all visits to social networking sites. Google UK was the top dog at 9.59% of visits.

Update: It turns out that the shout out account is just an internal one for Twitter employees. Twitter gave The Next Web a statement saying, "W we can say is that it’s not a product. It’s an internal account where Twitter employees ‘give props’ to each other. " They didn’t acknowledge the TwitterOnNotice account, but it’s likely an internal deal as well.