Just wanted to direct you to my classified ad for my little mountain bike art studio (wickedchickenz.com) (although a lot of you might have already heard of it). We do commissions, prints, and have Tees.
http://www.ridemonkey.com/classifieds/showproduct.php?product=3204&cat=37
http://www.ridemonkey.com/classifieds/showproduct.php?product=3204&cat=37