I've finally gotten the 2.0.1 release uploaded to SourceForge. This is a bug fix release only, see below for details. It's being distributed as a gzip'd tarball like usual, and also as a patchfile against the 2.0 source tree. If you grab the patchfile, you'll want to cd into your 2.0 source, and apply it like so:
% patch -p1 < mailman-2.0-2.0.1.diff
Note that you'll likely need GNU patch for this to work properly.
Currently only http://mailman.sourceforge.net is updated, but the list.org and gnu.org sites should be updated soon. The release information on SF is at
[From the NEWS file]
Bug fix release, namely fixes a buglet in bin/withlist affecting the -l and -r flags; also a problem that can cause qrunner to stop processing mail after disk-full events (SourceForge bug 127199).