i think the sip experience on the diamond is approximately a billion times better than on my old vogue, especially in landscape mode. i was using fullscreen keyboard on the vogue.
i'm rocking
juicy's rom on my diamond, which has manual rotate screen mapped to the long press send key, so if i'm composing, i just rotate it manually and zip through whatever i need to type dual thumb style. there's no lag when you're typing with juicy's roms either, so that may help some folks as well.
hope that helps!
myke...