[soonisnow]

Clearly not every investor is as explicit, prolific (nor as insightful!) as Wilson or Suster, but many, even the most modest-sized and earliest-stage investors, have posted something specific about what attributes in teams they look for and what broad or micro themes they focus on; many have a "Portfolio" page which can yield lots of useful information on the companies they've already chosen to support, and why. Finally, believe it or not, CrunchBase is a solid way to connect the dots - if you think XYZ or ABC investors would be a great strategic fit based on their portfolio co's, go and see who _else has invested in them, since they're likely to care about a lot of the same dynamics.

A tiny bit of homework goes a long way in getting an investor to return your email, and in getting someone to feel confident in making that initial intro..