my opinions
WMA
i think itunes will just support playing back WMA files. why on earth would they want to allow ripping CDs to WMA, when they have the pretty-darn-decent AAC? and itunes music store in WMA is out of the question. i cant believe some of you actually thought they would do that. especially considering that the ipod doesnt support WMA.
The Interface
i seriously hope it doesnt suck as hard as quicktime STILL does for windows. man, its so ugly. the menus, everything. it looks half done. so i hope they find a way to make a nice brushed metal interface on windows. also, i hope they have the cool visualization still. it wouldnt be too hard because it's openGL, but i could be wrong.
Price
i also seriously hope that they dont decide to charge for itunes or have gay little popup windows when you start it saying "Upgrade to iTunes Pro" like quicktime. hopefully the music store will cover the cost of allowing itunes for windows to be free.
iPod Video
might be neat, but think about it. unless if they make an ipod with a color screen so you can view it directly on it, it does little good to most users. anyone with an ibook or powerbook knows how easy it is to hook it up to a TV anyways, and you can do a lot more with a laptop hooked up to a tv than an ipod. i just dont see it happening, unless it gets a color screen. and the camera attachment, also unless if they get a color screen. i would like to see the user interface on a color screen, though. an aqua interface would look better than the newton-esque interface on the current ipods
Bluetooth
bluetooth is given way too much credit. its slow, the range sucks, and its only good for syncing phones/pdas (but even then just barely) and keyboards/mice. a bluetooth dock, like others have said, is pretty much out of the picture, and would be close-to-utterly useless, not to mention slow. firewire is so fast, and only takes one small cable. come on people, you're getting way too lazy.
and bluetooth headphones. any of you out there wanting bluetooth headphones own an ipod? the headphones are great. small, good sound, and lightweight. not a problem at all. not to mention, they're tethered to your ipod! realize that bluetooth headphones aren't going to be the tiny little buds you're used to. they're gonna be a bit larger. plus, they'd have to wrap around your ear so they dont fall out easily. and they'd have to have a battery, which would be a royal PITA. i own an ipod, and i would never want/need/use wireless headphones. the range sucks, you'd probably lose them at one point or another, and you're shooting unneccesary waves through your body. cant be good.