Works for me. Was looking for a "setLocation," figuring if I had found it then getLocation would exist. By the way, is there a replacement for canUseCommand?
As far as I know (I'm not fully up to date on this rapidly moving project) there is no centralized permission system. I do believe there is a plugin someone wrote that handles permissions, but I haven't looked into how to integrate your plugins with it (or if it's possible).
This brings up an issue, should there be a page on the Wiki devoted to such questions? Or at least a sticky?