I love how whenever Apple gives out music-themed invites to a press event, people gravitate to "must be the Beatles".
It's so comical how we have all the individual albums from each member, but we just can't get them all together.
If Apple Inc. can get Apple Records to release those albums, I think Jobs would want to make a statement to the other major labels in doing so. How? Put them up in open iTunes Plus AACs.
Anyway, back to iPod announcements, many guesses have already been made and are likely to happen: lower prices, bumped up storage, perhaps some tapering of the iPod touch's edges (to match the iPhone 3G and MacBook Air), and perhaps the retiring of the iPod classic.
One feature I haven't really heard floated, but which would be low cost and useful: the iPhone's same 2MP camera for the iPod touch. I'd like a better camera, but Apple most definitely wants people buying their far more profitable iPhone, thus they don't want to make the iPod touch overly enticing. Using the same 2MP camera would eliminate that and not only would it allow iPod touch users to take snap shots (and maybe video if Apple will open up that functionality) it would also serve as a barcode scanner, allowing Apple to use the iPod touch as a point-of-service device in Apple retail stores with custom software made using their Cocoa Touch SDK.
Obviously they couldn't deploy this immediately - they still have to get a credit card swipe reader that connects via the touch's dock connector - but this would offer faster checkouts and in the future, they could even sell the iPod touch bundled with a clip-on credit card reader and a simple checkout application to other retail stores, entering yet another enterprise and putting mobile OS X in front of hundreds of employees.