The third (and hopefully final phase) of Oracle Application Express 4.0 Early Adopter is now available. A new instance with the latest build of Application Express 4.0 is now available on http://tryapexnow.com.
If you had used the second Application Express 4.0 Early Adopter instance, your workspace and schema have not been migrated to this instance. You will need to sign up for a workspace but you shouldn't have to take the survey again. The original Application Express 4.0 Early Adopter 2 instance is available at http://126.96.36.199/apex, and it will be available for the next couple of weeks.
Thanks to everyone who has participated and provided feedback, as the feedback and suggestions have been invaluable as always.