Hate to say this because the screen on 810 is simply beautiful... but that's it, unless you have pretty good linux knowlege (don't know if i spelled that right) it's gonna be a pain for you. I just got both nokia 770 and 810 (i own an ipod touch too) and all i can tell besides the beautiful screen and long-lasting battery is really inmature software and a slower device when compared to the ipod touch.
They're maemo and MeeGo... "Meamo!" sounds like what Zorro would say to catherine zeta jones... after she slaps him for looking at her dirtily...