Facebook isn’t just a place to hook up with ex-girlfriends from high school anymore. Companies large and small are now using it for networking and legitimate business tasks. Unfortunately, it can also be a place to hook your company’s network up with some nasty viruses.

The latest one, a worm called Koobface, has hit all the social networks, including Facebook, MySpace, hi5, Bebo and Twitter, and can riddle your network with malware, spyware and can steal sensitive data right from your workstations’ hard drives. Like past generations of computer bugs, Koobface wants to not only infect your computer, but then use you as a jumping off point to infect others.  But unlike past viruses, Koobface and similar new malware programs are leveraging your company’s social network account to reach out and infect your online friends and business associates.

Jessica Biel has overtaken Beyoncé as the most dangerous celebrity to search in cyberspace, according to Internet security company McAfee, Inc. Fans searching for “Jessica Biel” or “Jessica Biel downloads,” “Jessica Biel wallpaper,” “Jessica Biel screen savers,” “Jessica Biel photos” and “Jessica Biel videos” have a one in five chance of landing at a Web site that’s tested positive for online threats, such as spyware, adware, spam, phishing, viruses and other malware. Searching for the latest celebrity news and downloads can cause serious damage to one’s personal computer.