At first we were testing with a very small number of users to work out any obvious problems before opening the beta up to a larger group. That's all finished and we're now at the point where everything is fairly stable and we need more people providing feedback. As a result we've expanded the size of the beta test group.
Please continue to just use the site as you normally would and explore as many different features as possible. Whenever you see a bug or have a comment/suggestion, take a second to let us know by clicking on the "Provide feedback for this page" button.
We've gotten some really good feedback already and are coding like mad monkeys to fix bugs and get everything polished up. Keep up the good work everyone, and thanks for the help!