Go here: http://www.livejournal.com/betatest.bml
You'll see the words [BETA TESTING] below the pencil logo while it's active, except when you're on the betatest.bml page itself, which is always on the normal servers, in case we shutdown the beta test machine for changes and you need to get back.
So if you do betatest, bookmark the betatest.bml page (or remember it), so you can go un-set your testing cookie.
The test machine is running against the real database, since we haven't made any database changes in the code, so you should be able to do anything.
What you should notice:
- it's faster
- bugs (but only after you've verified the behavior is different when you turn off beta-testing mode)
Client developers: send the cookie "betatest" with value "1" if you want to test your clients.
Update; 11:21 am: Fixed the majority of the reported problems. Off to lunch now.