Blog Badly is holding a contest:
Blog Badly's Free 125x125 Advertising Space | BLOG BADLY
Basically, just StumbleUpon the contest posts, subscribe by RSS, or write a post about the contest to get entries. Every week, I'll draw random numbers and if you get picked you get an ad spot on the blog for an entire week. Your points carry over from week to week so you are effectively entering in a chance to get a permanent 125x125 ad on a high-traffic blog.
Check it out!
Blog Badly's Free 125x125 Advertising Space | BLOG BADLY