Tryapexnow.com has just been updated with Oracle APEX 4.0 Early Adopter Release 3. Have a look!
We are now feature complete and appreciate any help testing all those features. A detailed list with the new features should be available soon. For plug-ins I have extended the apex_plugin_util package with additional useful functions. Check them out! They will make your life a lot easier and improve the quality and security of your plug-ins.
To sign up for a new workspace go to http://tryapexnow.com/!
Note: For those who had a workspace on the EA2 machine, you will have to sign up for a new workspace. Your existing applications on EA2 will be available for some time so that you can copy them over.