Perhaps a YC account on LinkedIn, which you could then befriend, allowing you to...

		ehsanul on Jan 17, 2010 \| parent \| context \| favorite \| on: Co-founder Google Doc - stage 2 (a semantic wiki) Perhaps a YC account on LinkedIn, which you could then befriend, allowing you to find others all friends with YC on LinkedIn? Just an idea. Seems like the simplest thing that could work well, without building a separate social networking site just for startups.

I think for this endeavour, a wiki works well.

Not everything needs a social network :)