Well that brings up my other question, which I wrote and deleted: what's the median frequency with which you talk to startups you've invested in, and how does that change (in a given case) with time?

They typically stop talking to me after the next investment (usually, when they have a Board of Directors they are responsible to)

Most startups do not update the non-board investors much.

I am on IM most of the time. There is a "Founders" section in my buddylist.