Along with this, we've made it possible to access Platform purely through Flash (via our new crossdomain.xml file) and/or Javascript (via the callback parameter). This means you can use Platform even if you don't have the ability to modify the code on your server - just use plain old html and some cleverly inserted <embed> or <script> tags.
Finally, we added some features you guys requested, including a bunch of new functions supported within FQL and the fields "is_app_user" in the user table and "size" in the album table.