I think we can expect to see the following for the new ipod touch:
Features
Retina Display - Yes! it may be expensive, but apple wants to make it the new standard. If some one sees how beautiful the screen is, that may alone, convincenthem of getting one.
Front Camera/Facetime - Yes! i know its been said around a google times, but apple wont sell 10 million iphones by december. Its just not gona happen, and unless some other apple product is being released in the upcoming conference, I think its about a 95% chance.
3G option - No! A 3G option on the ipod touch would COMPLETELY ruin the point of an iphone.
A4 chip - Yes! if that tiny thing isnt in the new ipod, then im a flying gorilla. most new apps are now geared towards the iphones's processor. I dont think theres any going back now for apple.
GPS - No! next to useless without 3G. Not gona happen
Colors - No! White is a mabey, but other than that, its just plain old black.
Compass - No! not beneficial to apple in any way, a compas is neither useful, nor even a minor marketing point
Rear camera - Yes! This is a MUST for facetime, im not gona go into megapixel predictions, but im convinced that there will be both cameras on the new ipod.
Gyroscope - Yes! Waaaay too cheap and useful to not be included.
Alumininum back - No! Chrome may be scratchable, but its a mark of theipod line. I think that the classic is gona end pretty soon here, and that only leaves the touch with chrome. If you take care of it, its actually pretty nice looking.
New design - Yes! the curved back on the 2g and 3g pisses me off and is part of the reason i still have myv1g after all thid time. The ipod touch is long overdue for a makeover
just my 2 cents. Feel free to send me hatemail.