...but could you make an install all for a 770 or N800, that would be really sweet but the script might not support more than one.
About the repos themselves, our priority is to promote extras and ease its access to application developers, so everybody finds better to upload their packages there. Having clever lists of repositories helps, but what definitely would help to end users would be to have a very limited set of repositories where all the good stuff would be easy to find - as it generally happens in the Linux world.