I just got my Korg DS-10 today - a six track step sequencer, with two virtual MS-10s, four tracks of drum synths, and a mixer - all for the Nintendo DS.
It felt a bit like history repeating itself; my first ever bit of software was Propellorhead's ReBirth, which was the same thing, but with Roland TB303s, and for the PC. It felt like the whole thing was starting over again on my handheld.
Which made me wonder, how long till we're using Garritan instruments on handheld devices? With SD cards at about 2GB on something less than a square centimetre, and wafer thin, surely it can't be too long till 'Direct-from-RAM' samplers are possible. Wouldn't it be cool to walk around with your orchestra, choir and piano in your jacket pocket.