One of the things I found on trawling the 'net about my N80 was comments that the firmware was to blame for a number of issues with the phone's operation. Whether this was to be fixed, it didn't seem to say. So, on a trawl today, you can imagine my joy in finding that the new firmware has been released at last for Orange 
It alledgedly improves memory management, fixes problems with bluetooth, in particular GPS devices, and appears to improve battery power management. But only time will tell 
It's available now from the Nokia site Phone Software updater. You can also check other Nokia models on their Software update availability page.
I've also found a site that deals with taking my old Nokia 7650 apart, as well as disassembly of the N80.
