all nodelets is a system default
nodeletgroup. There are many nodelets; some are what you see, some are used for development purposes, and some are used for the timed-update feature of nodelets as a poor-man's cron job. The nodeletgroup that the system uses to define what you can pick from is:
sidebar nodelets. Typically nodeletgroups are set up to restrict what a user can choose between, but clever users may be able to jimmy unauthorized nodelets (such as
old admin nodelet) into their VARS.
In ecore 1.0 currently in CVS, you need execute permission to be able to add in a nodelet. (I think. I could be wrong)
--
jaybonci