If you don't know about Phil Noto's Tumblr, you'd be wise to check it out. Some of the sweetest comic art around. Currently, he's been posting gorgeous drawings of the Game of Thrones characters. A lot of comics folks and comics fans are using Tumblr to nice effect.
I have my own pathetic little Tumblr, Random Shelly, which right now is mostly reblogs of my main blog, Cyber Chocolate.