Yep, as said, the 32/64GB are the faster newer versions.
I bought my other half the 32GB (£200 from Gatwick!) and I'm glad i did. I know she isn't that fussed with the speed as much as I am but when you whack movies on it it quickly fills the space. Future proofs it a bit more than the 8GB also, there may be 3G touch and 3GS iPhone specific apps down the line.
Kinda like when Homer got Marge a bowling ball! I prefer to play games on her touch as it's faster than my 3G!