From the author of Twilight Universe, he created at least 2 good plugins. Touched and Autosave.
Here from his Sack of Ajax, he points out why he chose to use his own library over sajax or dojo.
I’m silly to be trapped by my own contraints spending my whole night on a single library. Its time to for a change, I wanna create application as fast as ajax, there are better stuff to do.
[testing touched - is there touched for nested comments?]