http://mods.moddb.com/5133/
It sounds like an unique concept, so I'm downloading it right now and going to give HL2 another shot. Its been months since I played anything online, hopefully I don't get called a "faggot" by a 12 year old boy in the first 10 minutes of it.
Edito: The thing likes to crash something fierce. I'll just wait till it exits beta before I go near it again.