Ingenesis has announced the release of version 1.2 of their commercial e-commerce plugin. 1.2 is being considered a major upgrade as the release contains around 1,000 revisions with 300 bug tickets being squashed. Because of the amount of changes involved between 1.1 and 1.2, they are advising that you take all the precautions necessary before upgrading such as backing up your website data. Thankfully, the guys have created a best practices guide for upgrading as well as a list of template changes.
Haven spoken to John Dillick, Jonathan Davis and some other members of the Shopp team in person on numerous occasions, I can assure you that they take great pride in trying to produce the best shopping cart experience for WordPress. Congrats to the team on your 1.2 release.