Use for keeping inouch with a few otherwise hard to find people and couple of fishy things..
Personally tho I dislike the whole concept of facebook and its many applications and attachments and I am of the mind that facebook is the joint concept of the CIA,FBI,MI6 and Interpoll as a front to keep tab's on us all, people have been arrested for what they have said on fb, it encourages people to talk and message on a large scale and most topical and political issues get aired on it.

I know what Bobmacs gonna say