Private investigators can use this website to search numerous social networking websites with just one click.
Yoname's description:
"yoName turns your computer into a private detective. Look for anyone you want. You can even look them up by a username or an email address! If they're on any of the big-time networks like MySpace or Facebook, yoName will find them. Look up friends, family, ex-es. Look up yourself and see if someone's impersonating you. Or just have fun and look up celebrities, even if the first five entries for Paris Hilton are all "male, 39, single, in Madison, Wisconsin".
OK. Let's say you're at the club and you're flirting with this total stud (and he is way out of your league, by the way), and, boom, you score digits. The problem is, genius, that the next day they're still in the pocket when you toss your jeans in the wash. You remember his name, but he's not in the book.
Or let's say you and all your friends were gonna totally hang out after graduation and here it is, two years later, and everyone's either away at college or too busy and you have to pull out the yearbook to even remember your best friend's nickname."
Here is a list of the social websites they search:
Bebo
BlackPlanet
Blogger
Buzznet
DailyMotion
Deviantart
Digg
FaceBook
Flickr
Fotolog
Friendster
grono
Hi5
ICQ
imeem
IRC-Galleria
Last.fm
LinkedIn
Live Spaces
LiveJournal
Match
MySpace
Rediff
skyrock
Tagged
Twitter
Vox
Web Search
Webshots
Xanga
Yahoo
Yahoo 360
YoName
YouTube
Zorpia