there's an app to store addressbook thing in ipod (goes in as playlist or something, and shows info like name, address, phone number instead of song, band, etc).
I forgot what it's called. but if you do search on iPod on versiontracker, you'd probably find it.
well, eventually, I'm sure people will be using a pda/phone/portable-audio device... i dunno when that's gonna be, but... my opinion is that most of these combo things out there now suck. I dunno who came up with that phone with mp3 player, but that's one of the shittiest thing I've seen.
As for iPod as PDA... maybe it's fine if you're only gonna look at small info that's already stored in it...
I'm not sure how many of the people that are saying "if iPod functioned as a PDA, I'd buy one" have actually held iPod in their hands. It's smaller than Palm (well, thicker...but that's not important), and iPod's screen is smaller than half of it's top surface... smaller is better for portable devices, I guess...but if it's a PDA, you need to find some middle ground for the size of the unit and the size of the screen... that's why I got rid of MP2100, too... sure, it had alot better writing shit than palm, and it was great... but it was just too damn big to walk around with...
if someday, there's an external keyboard, I'd rather have one like palm... foldable might be cool to look at, but the keyboard won't be that flat... and iPod's already as thick as a deck of cards... if you have them together... well... it sure will be uncomfortable to carry them in a pocket...
having said all that... I'm not an inventor or anything... and I never come up with anything cool... so, maybe somebody will come up with something that satisfies all these things...