iHave an iWalk in my iPocket right iNow. iAm going to iPost iPictures of iT online for you all to iView.
anyways, back to the topic...
Updated iPods sometime in april, or early May would be nice (right around my birthday

) I assume that they would have a 10gig model, for the same price, and maybe drop the price on the 5gig model if they keep it. Some other added features would be nice, but if Apple puts too much into it, it will come out as an overdeisgned, complex, digital do-hickey, like every other mp3 player.
As far as support for other types of audio, the iPod is made so that it can be updated, which means support for newer music formats for at leas a year or two, before it really becomes outdated. Although, in another year, you may be able to get 20gb of sram (better than SDRAM) for 20 bucks, who knows?
Anyways, I'm just saving up my money, waiting for any update, or something like that soon.