I think we'll see the following:
1) New iTunes 9.0 software with some interface improvements, social networking interface, support for the "Cocktail" digital album liner note system and a new QuickTime program that adds Blu-ray support for certain Mac Pros (available now with a BD-RE drive upgrade) and for the iMac and MacBook Pro (upgraded models coming in October).
2) New 5G iPod nano with 3.2 megapixel camera, 16:9 aspect ratio display, improved version of the 4G nano interface with "Cocktail" digital album liner note support, and 8 or 16 GB of flash memory storage (unless Apple was able to get higher density flash memory, then we may see 16 or 32 GB of flash memory storage).
3) New 7G iPod classic with 3.2 megapixel camera, larger 16:9 aspect ratio display (with smaller click wheel), interface akin 5G nano with "Cocktail digital album liner note support, and mostly likely 120 GB hard disk storage (though it's possible we may see a single-platter 160 GB hard drive or 128 GB flash memory storage).
4) New 3G iPod touch, which is essentially an iPhone 3Gs minus the cellphone functionality but now sports a 3.2 megapixel camera. It will use the iPhone 3.1 software, which adds "Cocktail" digital album liner note support. Storage capacities will be 16 GB, 32 GB and 64 GB flash memory.
5) A possible announcement of the remastered Beatles catalog now on the iTunes Store, with the remastered album downloads including "Cocktail" format digital album liner notes.