Curve 8900 might be the next model to get the refresh. BerryReview appears to have scored a shot of the alleged 8910 in its most natural environment -- a desk calendar -- preserving the Curve series' typical broken-up keyboard style (as opposed to the connected keys you see in the Bold line). Otherwise we don't really know much, but naturally, the new model is said to be running BlackBerry OS 5.0 under the hood (in other words, it'll look pretty much like every other BlackBerry you've used in recent memory). More on this puppy as we get it.
Update: Unwired View points out that there's a Bluetooth SIG certification for an 8910, so this is all lining up pretty nicely, isn't it?