Today I flashed my USB Bluetooth dongle to newer firmware — it had v134 from 2001 now have v524 from 2003 (nearly newest one). Getting needed data was not quite easy — TDK provided it with older drivers that available ones.
So currently I do not have not-yet-(re)flashed device… flashed mainboards bios, cd/rw, cd, dvd drives, gfx board, palmtops.. my other devices are not flashable.