I myself have often been thinking about building a Chrome extension but never gotten around to do it because I'm not sure where to start, something like this seems like a good scope for a first Chrome extension.

Also on a side-note, I checked out your github and saw your foureyes repository, that's a really neat idea I really love that project. You could probably turn that into a business (especially if you build an app for it and sell inbound traffic/affiliate marketing to resellers of glasses/sunglasses).