If you're planning on doing word processing, might I recommend the Freedom Pro Keyboard?
It can use with SPP or HID bluetooth. Android doesn't have HID bluetooth capabilities (yet), but the drivers for the keyboard will let it sync via SPP bluetooth. I have the keyboard currently and LOVE it. There's still some issues to be worked out, but the developers are very approachable and are eager to get things working seamlessly.
Plus, when Google finally gets around to adding HID to Android, the keyboard will still work!