RC3 has been released, please see http://my.bzflag.org/bb/viewtopic.php?p=11558 for more info.
Ok, here's the deal. We are indeed making a 2.0.10, mostly so that we can have a good build for the various Linux distributions that ship BZFlag ( debian, ubuntu, gentoo, etc.. ). We also took the opportunity to fix some bugs that were found after 2.0.8 was released. That doesn’t mean a couple small features didn't sneak their way into the code as well

Including:
Windows platform fixes ( confine mouse, fullscreen/windowed mode toggle, etc. )
Packet loss kick.
Extended observer info.
Security updates for chat messages from non player connections.
Favorite servers.
A number of new plug-ins and API enhancements.
You can see the change log for more detailed info.
This is a pre-release candidate build for that version (2.0.10). It IS compatible with existing 2.0.x servers, so you can play still with everyone else. If all goes well we hope to have 2.0.10 as a final release in a few weeks, but we need YOUR help testing it.
We have a windows installer built now. Debian/Ubuntu packages are being made and will be posted when they are ready. In a few days we will try to have a MacOSX universal ( yes, universal ) build made available. Mac users should note, that 2.0.10 and future binary versions will not support OSX 10.2, 2.0.10 will be made as a universal build for 10.3 and 10.4 only.
This does not mean that development has stopped on the next major version, 2.2 at all. This is simply a maintenance release of the changes that have been made in the 2.0.x branch, again mostly so we can get a good build into the Linux distributions. Development is still ongoing for 2.99, to be released as 3.0. 2.0.10 does not contain any new major features, or flags, or gameplay changes. It is just like 2.0.8 with regards to gameplay.
Source Archives
http://beta.bzflag.bz/builds/2.0.x/bzflag-2.0.10RC1.zip
http://beta.bzflag.bz/builds/2.0.x/bzfl ... RC1.tar.gz
http://beta.bzflag.bz/builds/2.0.x/bzfl ... C1.tar.bz2
Debian/Ubuntu packages.
TBD
Apple OSX Universal Image
TBD