I think this comes up when you have developer support enabled, I'll double check (probably not until the weekend, though). It's been available at least as far aback as ACES 3.4 and maybe vanilla ACS 3.4.
We've also talked about putting up a couple of test servers for those, like yourself, who are too lame ... er don't have servers of their own
:)
(Michael and I know each other quite well so I get to tease him in public!)
