Here is one use case (mine ) I feel mbarcode doesn't address adequately presently:
I have a set of storage boxes, which each have a QR-encoded sticker with a URL in them pointing to a page that describes the contents of the box along with a few photos of the contents. I would like to whip out my N900, point it towards the boxes and have my web browser be redirected to the said URL without needing other interaction; should I point to another box, the browser should be redirected to that new page, again without any interaction other than moving the camera.
Now, maybe mbarcode isn't the application for this special use case. But it'd be nice if it were . An alternative to use mbarcode would in my mind be a fork that would use a webkit widget for displaying the page. That way it could still provide its own menu for options.