mrboni:
Thanks for the linkI was looking at those Maxim drivers but didn't think any of them supported PWM. Am I wrong?
Nice to know about the free samples!
Like I said, I'm not sure if they can run PWM signal, I have a couple but haven't used them (too busy burning Macbook's logic boards :S ). But in case you try it, post back with the results. I'm planning on using them on a future project, and would be nice if I could get PWM control.
Something else I remembered: you can try using an LED painter from Brillidea (http://www.brilldea.com/product_LEDPainter.html). It might be overkill, or it might be what you're looking for 