Check out these sketches Gabriel Hardman posted on his blog. The Daredevil piece is his contribution for the Comic Book Legal Defense fund auction at SDCC this year. The really cool Ultraman piece was for sale on his blog.
The first amazing piece comes from Mitch Breitweiser, which he posted on his Tumblr. He will be be at the Dallas Comic Con this weekend and will be selling prints of this Captain America image. Bettie Breitweiser did the gorgeous colors.