I gave my Palm M105 to my Mom many years ago for Mothers' Day. I used it mainly for it's awesome alarm that could wake the dead (and for iSolo eBook reading). She ended up never turning it on or using it and the new batteries I installed in it corroded the insides when I checked it a year or so later.

The worst thing I've done to my N800 is

sudo gainroot
apt-get upgrade
y