Here's an impressive sketch by Rick Burchett, the artist on Superman Adventures, Batman/Huntress: Cry For Blood, She-Hulk, and the upcoming relaunch of Batman: Brave and the Bold. Rich is a real class act and a consummate pro. He's also a St. Louis-based comic book creator. It was fascinating to watch him work from the early pencils up until the final marker stroke was applied.
Below is a little piece featuring everyone's favorite Wookie: Chewbacca. Done in markers by talented illustrator Nathan Ohlendorf, this is a really fun picture. See more of his stuff at his site, where he has a variety of fantasy and sci fi work: