WORKS! Let me share my experience with 2gb support problem in Nokia 770. I tried different things; flashing kernels from linux machines and from the unit itself etc with no luck. and i knew that the card is good, because I could format it using my PC which has built-in media reader and could copy files to it. Then I started thinking that it's gotta be the way the card sits in the unit, so I pushed my 2gb kingston card to the memory slot, but not all the way so that it does NOT click in place (which normally you would do), then closed the cap. It is important to close the cap otherwise unit wont even try to read the memory. And I got the "Memory card available" message and I confirmed the card size (1.89GB). My buddy had the same problem and I explained him what to do over the phone, it is working for him too now. You dont need to install/flash anything to make 2GB cards work on your unit which runs OS 2006 versioned 3.2006.49-2. Unless you want it to run faster. And by the way, I got it from buy.com. I hope this works for other people out there still trying to make this work.
cheers,
jay