SourceForge has recently made Subversion available to projects, and I am planning on switching us from CVS to Subversion after the 2.1.8 release goes out. If you don't access the bleeding edge Mailman code in the source repository, you probably don't care, and can ignore the rest of this message.
If you've used Subversion before, you're well aware of the many advantages of using it over CVS. I'm psyched to make the switch, and Tokio and Mark are on-board with it. I may even start finding time to begin hacking on the code again. :)
If you haven't used Subversion before, now's a good time to take a look. You can start here:
You should easily be able to find Subversion clients for any major *nix distro. I think it's pretty easy for CVS users to learn how to use Subversion, especially if you're mostly doing anonymous checkouts.
I will send out another message just before I make the switch. I'm not sure how smoothly it will go -- SF has automated the process, at least for 'sane' CVS repositories. Hopefully ours is sane! Once the change is made, I think the old CVS repository will still be available, but all the fun stuff will be happening in the Subversion repository.
-Barry