As it happens, Magda’s Sony clie has a backup-to-memory-stick feature that is a proven lifesaver. Not to be outdone, I found two open source backup programs that perform that same task in the Treo 600 -or any other PalmOS handheld with a flash memory card, for that matter- Red Feline Backup and VfsBackup will back everything in RAM to a folder in the card, but I like VfsBackup a bit more because it will copy only those files that have been modified since the last backup. I guess now there are no excuses to back up the PDA often.