No, because
a) I back up to an SD card regularly
b) My Palm completely stopped crashing (which vipes the memory) when I stopped trying to use it as an Internet Tablet.
c) The way I handle my gadgets there's not much chance my Palm will be stolen.. the only way is by a genuine mugging of the violent type.

I always found synching data a hassle, it was only viable as a kind of backup mechanism and then I could just do a regular backup instead. The synch method's main purpose (as opposed to just backup) is to mix and match input/maintenance from different devices (e.g. PC, PDA..) and that just doesn't fit my way of doing things. I prefer to use a single device for that.