This post is from 2010. Drupal has changed since, so check the current API documentation before you copy code from it.
On June 24th, we at Pure Sign organised a Drupal User Group meeting around the topic of E-commerce in Drupal. First, an introduction to setting up an Ubercart webshop was given by Hans Rossel. After that, Joachim De Schagt and I presented on more advanced Ubercart topics, and what the future of commerce in Drupal 7 will look like.
Below you can find the presentation slides of this talk, which was in Dutch.
E-commerce in Drupal
View more presentations from Pure Sign.