It's Java/J2ME based, so you may be able to compile software made for the Symbian 60 phones, in which case, it's a whole lot of work with possibly no benefit.
As far as I know very little work to bring emulation to the RIMs have happened, only because it's really marketed as a communication tool as opposed to the PDAs which are be alls/do alls (re: Palm).
If you're really considering a gaming PDA, try the Tapwave Zodiac. Or, try the RIM and wait for the GB Micro.