My Treo was stuck in a reboot loop, so I gathered links.
How to edit the preset favorites on a locked Treo. How to enter debug mode at boot (hold the up-arrow key on the little navigation pad thingy). How to flash the ROM in a Treo 650. Shadowmite’s Treo hacks site. Using a Sprint Treo 650 as a bluetooth dial-up modem with Sahadowmite’s DUN hack in place.