Sometime last week BangWithFriends started going round. The app lets you (anonymously) mark Facebook friends you are sexually interested in. If the interest is mutual, you’ll both be notified.
Brilliant app I must say (it makes our promiscue youth even more introvert)! It gets really interesting when combined with Graph Search:
Looks like I don’t need to install this one, yet 😉
For Professionals, there’s also Bang With Professionals, where one has to log in using his LinkedIn account 😀