It looks like a perfect example of minimalist usability, and definitely not something you should feel guilty about. Aside from the rough edges, of course, like the fact that it's hard to install until Chrome makes some more progress on their extension API.

Thank you. :) It is mostly just a guilty pleasure project for when I don't want to do contract work.

Yes. The install process is horrendous. Starting Chrome with a terminal command gets irritating to say the least. Hopefully Google will roll some of the APIs into beta soon.

Thanks for testing out the omnibox API when it is still so difficult to use. We start out new APIs in experimental to get a feel for how they work before becoming stuck with them forever.

No problem :) I've had fun working with it.

Is the Chromium Extension Group the best place for me to provide feedback on the omnibox API?

The group is a good place. We read tweets and blog posts too, so that will eventually make its way back.