great idea for a plugin, but i think it might not work on multisite? or it's any other problem maybe.
i have a multisite installation and tried it on my testblog. even with the tagcloud widget the tagcloud wouldn't appear. i initially grabbed the plugin because of twitter widget pro.
i'm running quick cache but as a logged in user the site shouldn't be cashed so I don't think that's the problem.
just wanted to let you know, thanks for your efforts!