For me it's a public status board that reminds me of the old bulletin boards at the supermarkets, but with a feedback loop and the way to create a thread, something the old bulletin board didn't really easily do.
It also reminds me of the old classified ad system in the alternative newspapers.
Boy posts note. Girl responds. Other girl responds. Boy replies. Boy and girls hook up for drinks, whatever. Girl posts note about guy to other girl. The game goes on. All of that said, I just hope flames don't start twittering.