Nice! I just gave it a try and it worked perfectly. Some screenshots are attached so people can get a feel for it.

My initial thoughts:

I understand the desire to not go hog wild, but what about enabling any of the optional UC core modules? In particular, catalog. I know it's not a requirement for a UC site, but it's likely that people will use it (*cough* unless it was views-based instead *cough*) and it's kind of confusing to users when there are no catalog settings available off the bat -- how do I organize products? how do I display a catalog of all my products?

It doesn't do as much as I'd expected, but it just plain works nicely for getting the right modules in place

It feels like Ubercart would be an amazing candidate for Patterns: http://drupal.org/project/patterns

I fell in love with Patterns after seeing my first demo... it's everything that install profiles needs to be (or simply work on top of). I'm still eagerly awaiting something more than a dev snapshot for D6 though. Anyone else played with Patterns yet?