I've been messing around with this a bit, bringing a small stack to the table and playing standard poker after doubling up.

There's definitely something about being the short stack....with a full stack if I raise $3 I usually get few callers that don't have a strong hand...if I raise $6 as a short stack I get called by KQ and A8o. Baffling. I'm starting to think that in the online world respect = stack size. People aren't paying that close attention to how you play, so if you have 3x max buy-in in front of you you can steal some pots (people assume you've got the goods and that you're solid) where as somebody with pittance in front of them is assumed to be weak/foolish. For whatever reason, the small stack all-in gets callers you don't get with a full stack.