Nintendo DS
The NIntendo DS has been around for a few years and it has beaten out the PSP time and time again as the top selling mobile console for this generation. I think the Nintendo DS stands to be a pretty good console for a while to come as well. Perhaps even better than many of the consoles that have come before it but I know for sure that with the Acekard 2i the Nintendo DS can do a lot more. It can watch movies and play emulated games for one thing and it can even have the ability to use homebrew.