I wish this had been released a long time ago. Now I want a DS because of the extra power (for emulation purposes,) but I would have picked one of these up in a nano-second.
I also like the SP's size. I actually like the DS as well, (and will be picking one up in the near future.) Still, there's something very cool about miniaturization. Depending on the price, it might be cool to pick up the MicroBoy anyway. I gave my SP to Auggie, but I still have my flash card. (which will also work in the DS/MicroBoy.)