I've been messing around with photos of products for so long - I think I may have a good solution! Actually, it's an improvement on something I've done before. I set up pieces of white foam board as a makeshift light box, then had overhead lights plus my camera flash. Really, my flash is NEVER in use - but for this kind of shot it's great. Colors get a little washed out, but overall I like the bright effect. And with this, I can take pictures at night, something that is impossible to do when attempting the "no flash/natural light" thing.