Well I'm gonna get the current Touch. That said, if I had to make a list of everything that would be cool to have, I'm not sure when such a Touch would be available... maybe in 2-3 years.
Here's what would be nice:
1)500GB
2)GPS chip
3)slightly better camera (at least 2MP)
4)vibration
5)1GB RAM
And that's it. It would be perfect. Really, I'm not asking for that much, am I? At least points 2 and 4 seem easy. Maybe slightly harder with the camera, but the capacity 500GB and 1GB RAM is only a matter of time.
Right now, my biggest beef is lack of a GPS chip. Also, how do you know you got a FT call, if there is no vibration?
Regardless, I'm pretty happy with this generation. I'm buying it next month.
It's called a ringtone, the ipod touch does have a speaker