I do not know if this helps or adds to the mess, but I thought I would follow up that my Palm Bluetooth keyboard 3245WW as of the last OS update now works partially, (Maemo 5 3.2010.02-8.002).
Previously (as had been for others), I could pair up, but never get input to work with the keyboard. Other bluetooth worked (stereo in the Prius, headsets with Skype, etc).
After the last update, now the keyboard mostly "just works", upper and lower case letters work, and the period and comma work, but all the numbers, and many of the symbols like quotes, do not work. It is possible with all the fiddling I did trying to get it working over the months, that this is due to my own errors. I will try to roll at least the config files back to original just in case (unless anyone advises me to do otherwise).
At least there is some hope now on the horizon, this has been a significant show stopper for me in the adoption of the n900 as a primary device, really looking forward to it's improvements. Let me know if I need to provide any dumps, or other information that may be useful.
Cheers!