Oh well, one of my hosted web sites had the server get 0wned... my web page suddenly took quite a bit longer to load and looked rather different, too.
The hosting company appeared to notice pretty quickly, though -- when I telnetted into the box from another machine on the same network (ssh didn't work any more) to see whether my files were still there, five minutes later I got a broadcast message from root telling me the system was going down.
Afterwards, things appeared to work... mostly. My Perl scripts, including the one that filters my mail, were all broken since Perl had moved. Previously /usr/bin/perl was 5.004 and /usr/local/bin/perl was 5.005_03, so I used the latter -- now, there was only one Perl, 5.6.0, and it lived in /usr/bin. Some of the modules they had installed for me were also gone, so I had to adjust 'use lib' paths and installed them locally for the time being.
Fortunately, mail appears to work again. Having mail bounce is ugly.