My personal "Man-Bag" is a messenger style black and silver bag with a large PS2 logo on the side. I use it to shuttle my gadgets and empeg to and from work... I know you want something smaller, but the messenger style has room for my sketch pads and the empeg and all the other weird little things I don't want in my pockets.

Plus the PS2 logo diverts any girlie comments into the dork arena... Wave your Geek-Flag!