Art Friday : Blue Sky Studios Challenge
A collection of themed illustrations from the creative staff of Blue Sky Studios which created the animated film Ice Age.
Each Monday, a challenge is posted on the Blue Sky Studios Challenge blog and Blue Sky staff submit their takes on the particular theme for that week.
Some of the challenges that I like a lot (each with a sample entry):
1. Dinosaurs
Yeee-Haaaaw! - Jake
Donatello - Peter
3. Fairy Tales
Hansel & Gretel - Biancalana
Unknown - willito
And my absolute favourite of all the challenges - Evil Robots (especially the bunch of rabbit-munching bots)
rawrrr! by Jake
Other cool challenges:
Classic Movie Monsters
Favourite Pixar Character
Favourite Video Game Character
And last but not least : Star Wars recommended by Your Daily … (another great collection of Internet goodies) which led me to this marvellous blog 
MORE @ THE DOWNLOAD MUNKEY:
Startdrawing.org
Art Lebedev (Russia)
Blue Moon Rising
Into The Pixel 2006
what a clever idea… neat!
Hi elderly, Rockstar Games San Diego also have their own challenge at Rockstart