As it happens, just last week I finished my fourth Drupal site and first Ubercart site for my sister's business.
http://www.catherinecolebrook.com

As Jeff said, ecommerce is not a trivial business and there was a ton of new stuff to deal with (mainly on the payment side) but at the end of the day it was a good experience and I like Ubercart a lot. There's only one dangerous thing - listening to the show gave me a ton of new ideas for ways I could use Ubercart..!

thanks, gang. it's really helpful to hear some narrative about Ubercart, and a description of architecting a successful Drupal + Ubercart site.

i wanted to point out a new module that the folks over at Growing Venture Solutions wrote for a project we worked on together. it's called Signup Integration for Ubercart, and true to its name, it integrates these two excellent modules to make it easier to accept payments for event "registrations". it's pretty directly relevant to the registration challenges you discussed for your workshops (starting ~33:00). i'm not sure i understand how uc_node_checkout works, but i'd love to hear anyone's thoughts comparing the two different approaches. mostly, though, i just wanted to point out uc_signup as another option.

anyway, thanks again, and thanks to Ryan for all of his work on Ubercart.

Jeff mentioned that he might write up a case study on implementing the Lullabot store and post it either here or possibly over at drupal.org; that would be an excellent idea.

I have looked but can't find it so perhaps it hasn't been posted yet ;)
Possibly I'm looking in the wrong place, but it would certainly be a helpful resource.

(Great podcast, as always)
Pete