Thanks for your suggestions.
I am building this to support a live Ubercart 1.x installation, so the first pass will be for that version. At some point in the future, I will try to provide updates for newer versions of Ubercart.
Can you provide more details about when to submit a module here and when to put it on drupal.org? Since this module most directly affects Ubercart, it seems to make sense to submit it here.