Nice list - a lot of cross over with my own personal 'want' list.
Add-on:PleXBMC(wiki) - Play Plex media through XBMC PleXBMC Helper - Integrate Official/Unoffical Plex remote control apps into PleXBMC
PleXBMC Repository - install and manage all PleXBMC addons
Quartz3 PleXBMC - Integrate PleXBMC into home menus