Not much... just a little mailutils hacking. We now support the maildir format, which is very cool, the file: auto-detection url is great, and all from-like utilities now use rfc2047 decoding. We have also a new tool, called movemail.
And yesterday I went to listen to the 2,5h lecture on LaTeX. I already know Texinfo, which is obviously similar, but has different goals and is less powerful.