BlackBerryToday: Reviews. Hardware-wise, Blackberry has two interesting models that are just out.
There is the Blackberry 8700 which is the palm-sized unit. Only available from Cingular right now, but it has EDGE support so networks are faster and it is quad-band as well so it can go anywhere in the world. It is a little narrower too, but the main thing is the screen is much higher resolution and brighter, although battery life is down.
For those of staying just in the US, there is the 7130e. This is the 9-key version but it has EV-DO so it is very fast on the network side.