First of all, let me thank Strobist for this idea. I made the mini studio like this: Strobist: How To: DIY $10 Macro Photo Studio
I fired my 580EX II from the right with a desk lamp on the left providing even (sort of) lighting. Two Speedlites would have a much better effect. Really good idea, quick and easy. Very professional looking results. Next project is to get some umbrellas!