Well, the Newton is pretty much a deal platform. That is, there are no new apps coming for it. NewtonScript was an incredible OO language, and as it was such a sheer joy to develop for it, there's prob. an app or two that pops up a few times a year. Arn, here, was quite a NewtonScript developer in his day:
http://users.visi.net/~arn/Newton.html
Anyway, it has the best OS and general "feel" of any handheld out there. That said, there may be something worthwhile in using one even today. I have an MP130, which is the best pad formfactor Newton next to the MP2000/2100. And it's slow. It has a 25MHz ARM 610 CPU. The MP2000/2100 has a 162MHz StrongARM--many times more powerful. The 2000 has less internal "heap" memory, and as such every so often you could not load a new app and would have to reset. This was resolved in the 2100. So I'd get a 2100, either a straight 2100 or an MP2000 that has been upgraded to a 2100. But you're going to pay $200 or so for that on eBay.
My MP130 that I got 1.5 years ago was new in box, mind condition. I sold my MP2100 in a fit of insanity 3 years ago or so. I would like to get a beat-up (< $100) MP2100 to play with again now that I've got OS X connectivity. We'll see how it goes.
I've got my fingers in too many pots presently, though. Ethernet hardware coming for the Mac Plus, still setting up the Atari 8-bit systems being served by a hacked Win98 machine, and now there's something new on the horizon that I'm not going to even mention here lest someone else bid on it first! Maybe I'll wait on that MP2100...
blakespot