Apple need to scrap all ideas they have for "OS X" and "WiFi" and just stick the basics.
People buy iPods because of their simplicity and stylishness. Throwing in OSX will just turn all attention away from the actual basics.
As far as i'm concerned, apple haven't mastered the basics (battery life ect). Untill they can get a iPod that can run for 4 days playing music non stop, they should stick to the basics.
Throwing in WiFi and bluetooth will just drink the battery life. So those people who do not want those features, will suffer.