That's the information that pays! Why we need FuckedCompany back...

I'd say Digg and LJ is high on my list - although LJ running off to Moscow might've saved it in the longrun who knows.

Something like (highest is most likely, lowest is less likely)

Digg
Delicious
StumbleUpon
Multiply
Orkut
Pownce, Jaiku
Ustream, Justin.tv
Second Life - all the tier changes are pissing the members off
Livejournal
Upcoming.org, Eventful, Meetup.com all those sites
Bebo ?
LinkedIn - used professionally quite a lot, look after their own
Last.fm - music legal issues
Twitter - small, yet makes no money
Facebook - big sponsors
Youtube - ditto - big pockets
Flickr - ditto - big pockets - Google
Wikipedia - just had a funding drive
Myspace - has Fox's money, innit
Ebay - profitable