I love love love Sock It To Me socks, they are the cutest. Carrie (owner) hired me and two other freelancers to design socks in 2006 and she picked these designs from me; peace and love and broken heart. I'm excited every time I see them in the stores.
Anyway, this is the third year they're having an annual contest (somehow I just found out this year.) Too bad, you can only be Portland residents to enter, blog here. Though don't feel bad, they also have an on going design a sock contest here. Check out their website and you will fall in love with those knee highs socks too :)