It's about time Linux users had a proper pad plugin! ZeroPAD now supports gamepads including analog axes... which some games are impossible to play without! So if you are a Linux user and are dying to play pcsx2 with a gamepad, please update the sourceforge svn or download the zeropad plugin sources below. If you are downloading, just unzip into your previous zeropad folder and 'make install'. For people having problems, post your questions in the forums.

you can grab the source from here

EDIT
For those people having trouble compiling, completely delete the old zeropad directory and re-update. Then run 'sh build.sh all' from the root pcsx2 dir. Or if you want to do it manually, execute the following commands in the zeropad folder:
aclocal
automake -a
autoconf
./configure --prefix=`pwd`/../../../bin/plugins
make clean
make install