Yeah I've got one and here's a little summary:
Interface, well the touch screen is very responsive & sensitive and the whole menus are in a very good layout really suitable for the touch screen.
Games, at best they are around psp standard but overall they are sort of like flash games or crap ds games. The graphic capabilities are pretty decent though.
Music, well there's a good interface for music but you need to use Itunes to transfer music and stuff. The sound quality's alright but funnily enough, not amazing. I mean it does the job and does it well but it's not spectacular and it's quite a disappointment that it's not better than it is because you pay quite a lot for the system!
Design, it's sleek and light-weight and it looks sexy. Just get screen protectors in case. It's also pretty durable. I mean, it can take a beating and still look good.
Multimedia & apps, bluetooth, access to internet (fully working with youtube and everything), access to appstore, videos, etc
There's almost limited possibilities. The app store is vast and the prices are great. There's everything from gta-style games to xbox live friends contact to ghost radars, etc
Great system. I own the 32gb 3rd gen model. Do I think it was worth just over £200? Yeah but it's not perfect, eg: the battery life lasts a maximum of 3 hours on a fully 3D game on medium backlight (but up to around 38 hours of music listening with the headphones in and the screen off for the most part).
The sound quality is good but only a bit better than average which is a shame.
But those are my only complaints really.... the Ipod Touch is awesome. But for gaming, the psp will always be the best handheld (IMO).