I'll echo the interest in having a version of this 'on steroids', kind of a mix between the Default Widgets plugin and this one. Specifically, I would like to set up our widget layout and push it out to existing users. (My site is used in a commercial/medical environment, so our layouts - for now - need to be locked down).
Hopefully I'll have some time after our launch to work up this plugin.
Im a big fan of all your work. this plugin is awesome!! im really excited to see this completed. is there anything i can do to help? i can test for you as well. keep up the good work.