Sorry FL, but I have to completely disagree with you. I use memory Maps on my iPaq 214 pda and its brilliant. Can zoom right into the most detailed setting without any trouble (not that you would have it set to that level of zoom).
The iPaq 214 is a fairly new model pda with a slightly larger 'touch' screen, so maybe older PDAs aren't any good? Although, everyone in my group has an older pda and it looks good on them too.
I also have a Nokia N95 8GB mobile and to be honest, I wouldn't use memory maps on it (whether you can or not?). I think it would be too small and fidly and you would spend more time looking inside, buggering around with the buttons than you should.
Getting yourself kitted out with a pda/gps receiver is one hell of a lot cheaper than buying a 'FlyAngel' for £600!