Since a couple months back, I & a friend have been working on an interesting project called Zerorose. basically its a web vulnerability scanner, but not in a sense you are probably thinking of. we scan your system vulnerabilities from our site.
Do you have a cool video so that I can show my friends?
In short: we identify exploitable vulnerabilities (hopfully) before the bad guys do. so you can roam the internet free without automatic client side exploits triggering out of infected, shady sites, malvertising campaigns and that porn site you sometimes visit.