Yes I've heard of it, they have been around for years. I wasn't sure if they were still around though. I think the logo might have been a pair of eyes - cartoon style.
Ah, here we go... their logo was their name, but the oo had eyebrows so they looked like eyes. Very clever. You can see what I mean here, and you'll be interested in this page if you are curious about LookSmart:
10 Year Timeline of LookSmart