Wish we could be there, but travel expenses are too steep right now. As I mentioned to Mike/Ryan, I'd be happy to hang out in an IRC channel to keep track of progress and pipe in on theming stuff as necessary

I'd love to see easier ways for non-technical users to manipulate the display of the cart and product pages, and also help with theming improvements. Usability is another huge one. And I'm eager to follow the progress of the Drupal 6 version.