Definitely a light weight portable with solid state storage, so no Hard Drive, it may or may not include the touch technology form the iphone.
They already intro the 8core processor Desktop unit.
Probably no Ipod updates sine they were all done in September.
There will be probably some software updates maybe ilife
The "oh one more thing" will probably something around the iphone, new features or a 3G version or a reduce feature lower cost product.