Popular jobs site Monster.com has introduced a new semantic search technology called 6Sense, which it says delivers "precision matches" for job seekers and employers. The technology powers Monster’s Power Resume Search, Candidate Spotlight and Seeker Job Search.

Just as many of us get back to work after the holidays, Twitter has some new people starting work with the company altogether. Twitter reportedly has ten new people (most starting today), and some of them have interesting backgrounds, which could have interesting implications for the company’s future.

Update: Pizza Hut announced today that its former "Twintern" now has the official title of "Tweetologist," and now holds a full-time position. From the announcement:

LinkedIn today announced that the professional social network has 50 million users worldwide. Perhaps more impressive is its claim that it is growing by "roughly one new member per second."

The company says that when it launched back in 2003, it took 477 days to reach its first million member milestone. The 50th million came much easier, however, in jus 12 days.

Twitter is a tool that can mean a lot of different things to a lot of different people. It can also mean a lot of different strategies and opportunities for a lot of different businesses. More and more companies and jobseekers alike are using the social network/microblogging platform as a way to find and fill jobs.

According to comScore, one of the fastest growing online categories over the past year has been Job Search. This is not surprising news by any means.

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.

LinkedIn has launched new custom company profiles. These let companies and other organizations create rich, multimedia overviews of what they are all about for prospects to view and engage with.

The custom company profile displays content that company’s can easily tailor and update, and the content dynamically adapts to the viewers, based on their industry, job function, location, and seniority. This is good for targeting.

Today Yahoo! released what it refers to as the first performance-based online recruitment product, Yahoo! HotJobs Pay Per Candidate. The new HotJobs feature lets recruiters pay for candidates instead of just per listing.

The idea is that this will help recruiters tie their dollars directly to their results. The recruitment community will get its first look at the product at the upcoming Society for Human Resource Management conference starting June 28 in New Orleans.

MySpace just announced that it is cutting its staff by nearly 30%. The company says this is part of a plan to restucture itself into a more innovative, efficient, and entrepreneurial business.

The Monster Employment index, which is a monthly gauge of U.S. online job demand, went down 29% in the past year. It actually went down a couple points after rising slightly in April. It might not be all bad news though.

Earlier this year, Google laid off about 200 employees in the sales and marketing department. Head of Sales, Tim Armstrong also left the company to become CEO of AOL. Armstrong then got Senior Google sales executive Jeff Levick to go with him.

Update: VentureBeat reports: "We’ve learned that Massive, the company’s in-game advertising business, suffered something like 75 percent layoffs."

LinkedIn has introduced a new set of tools for HR professionals called LinkedIn Talent Advantage. The release reflects LinkedIn’s mentality that the best job candidates aren’t always actively seeking new jobs, although job posting responses on LinkedIn have doubled over the last six months.

In a move that won’t surprise as many people as it would have this time last year, Fox Interactive Media has announced it will be cutting its workforce by as many as 100 jobs. Fox is the parent company of social network site MySpace as well as Photobucket and various mobile sites.

Job search was the fastest growing online category in the U.S. in 2008, according to comScore.

The job search category saw the number of visitors grow 51 percent to 18.8 million visitors. The final months of the year usually see a slow down in job searching activity because of the holidays, but were instead some of the most heavily trafficked months of 2008.

Employees in the U.S. seem to overwhelmingly share a "it won’t happen to me" attitude when it comes to losing jobs. Glassdoor.com has released results from a survey, which found that 4 out of 5 employees have no concerns about being laid off in the next six months.

GlassDoor breaks it down into two categories – companies that have reported upcoming layoffs, and companies that have not:

Reports have been surfacing since last night’s election that while overall, India seems to have embraced the election of Barack Obama as the President of the United States, there have been some worries among the country’s people due to Obama’s position on outsourcing.

The number of online jobs went up according to the Monster U.S. Online Jobs Index. The increase marked the end of a three-month decline, indicating that employers are preparing for the fall hiring season. In August, online job availability went up in 14 of the Index’s 20 industry categories and in 13 of the 23 occupational categories measured. Still, the index is 14% lower than it was a year ago.

Alaska, Nevada, and Delaware are in great shape.  The news isn’t good for the U.S. as a whole, though, as The Conference Board has recorded an annual decline in online advertised job vacancies.