I could almost hear background music swelling the further I read into your post! LOL!
Web-based would be a nice touch, but besides a dedicated server I’d bet it would completely change their marketing model and several underpinnings of the program itself. Consider the difference between Evernote’s installed program and the web client and then look at their marketing.
Giving Tabbles USB portability would allow the same functionality without putting their current path into the blender. Nice idea though!