Well they all say if isn't broke then don't fix it.
Having said that I upgraded the bios of most motherboards that I owned in the past. Upgraded firmware from other devices and upgraded ROMs too on my XDA's.
If you really want to upgrade to WM6 or WM6.1 then go ahead upgrade it but if you are just curious then maybe you should think again. I am not familiar with upgrading on Treo but if you nedto connect it with your PC then I suggest you use a laptop so you don't have to worry about power failure because if your PC turned off during the upgrade then bye bye Treo
