1) Is the camera any beter? (I know its the same hardware, i'm just hoping against logic)
Its similar you will not notice much difference.
2) can you tell the processor speed difference?
Oh yes, on the D1 i would get force close on almost all apps periodically on the d2 I have not received a single force close. The apps open instantly and everything just runs so much smoother.
3)Which keyboard do you like better?
The D2 takes a little getting used to. I was frustrated at first however now I seem to like it more. Seems more user friendly.
4) worth the upgrade?
Yes it is, the speed is incredible.