It would piss me off if Apple release a bluetooth enabled Touch early next year. It's a feature I'd find really useful.
That is the thing that is stopping me right now, I have only ever had the 4th Gen U2 iPod, so if I get a Touch I won't be getting (well intending to get) a replacement for a few years, so until we know more about this Broadcom chip I won't drop the $$$, also, I would really like a Skype client.
6 months is too early for any hardware changes, even from apple. Things that are potential would include a bigger harddrive as mentioned, or higher firmware to allow stuffs ($9.99 for bluetooth? =D)
buy now or wait a year.