First of all I have to say, I really like these two illustration blogs; The Little Chimp Society and Drawn!. They both always have new posts daily, they highlight great designers, illustrators and artists as well as interesting design-y and arts-y things, and they always announce contests and call-for-entries. Two of the latter sound really cool. I don't know if I will have time to participate, but I'm going to try:)
1) posted on The Little Chimp Society, the MAiLmeART project (deadline is January 30th! They are going to sell the pieces they receive and give the artist 70%... cool things shown on their site: www.mailmeart.com)
2) posted on Drawn, the Post-it-note project
(doesn't start until February 01; check out the original post at theartoffee.livejournal.com.