I'd like to announce that I've just finished upgrading the server to version 0.9.0. Checked it out, things seem to work okay. This is a pre-release version, not generally available. I have it because I donate to the developers.
When you first connect, you will get the silent 0.9.0 client download.
For me - my first connect failed and the menus were all screwed up. If this happens, don't panic, I was able to connect and everythign was peachy after that. If you see this happening, let me know.
There is already a known issue when connecting to 0.8.2 servers AFTER you've connected to an 0.9.0 server.
See this for more info:
http://mygamingtalk.com/forums/topic/6213-to-all-with-test-access-to-090/page-2
This is because they have added the ability to create custom load screens and stuff, you can read about it there if you really care. But just note if you play on another server (why would you) and things don't work, that is probably why.
So as I said: this is pre-release, so it could contain bugs. It has some new stuff we are looking forward to taking advantage of, especially in the realm of stats.