I bought an iTouch yesterday from JB Hi-Fi and it's sweeett!
I only bought an 8G one and I've been used to having my 30G iPod 5 gen, so I'll have to see how I get on with having enough memory. My iPod Mini was only 4G when i got it years ago, and it seemed to be fine for me then, but the Mini didn't play movies, and they take up more space.
Best interface so far though for an Apple (aisde from the iPhone, I guess).
I may post a review when I've had a better play with it :)