The currently best way is to grab the sources from the CVS at
sourceforge.net and compile it by yourself.
Or you can try the version I compiled for my server (debian 3.0/testing). Unzip to the $hlserver/joebot folder (you also need joebot-1.6.1-linux for the other files) and add the line
Code:
linux ../joebot/joebot_mm_i586.so JoeBot
to your metamod's plugin.ini