There have been a lot of bug fixes as well as the a complete rewrite of the checkout. The checkout ATM is only a single page and options like changing address and payment type have not been put back in. These are going to use the #ahah feature of the new formapi to allow users to change much easier. I am going to put back multi page checkouts, but this will be done by configuration and not be forced on the site admin.
The checkout api has completely changed and is now much more modular and should allow for much better formed functions.
Also there were problems with receipting now allowing the processing of receipts which have been fixed and now a complete checkout can be done.
If anyone wants to help they can help by picking other modules that are no longer going to be a part of the core e-Commerce and taking control of these.
Also with the implementation of the new views 2 reports, if anyone wants to start making new reports that they want to include please post them. If there is missing fields/features in the views integration please let me know.
To get the latest version goto http://drupal.org/node/333671
Gordon.