I'll try to get one if they have a 64GB model or larger. I have about 34GB of music currently and my 32GB touch only holds 30GB.
Although I might not upgrade, because I will have my laptop everywhere with me in college and not doing much driving, so I'll just use my iPod touch as an iPhone without voice around with all the wifi.
Definitely interested to see what they can do next.
Apple is on a "better battery life" and increased memory campaign, so those features are no brainers for a next gen release and not likely to spur sales. Likewise, the compass circuit is already designed and will spur app sales for those programs that take advantage of the magnetometer.
Without cannibalizing the iPhone's market what other features can they port over?