or forums.gentoo.org/viewtopic-t-578192-highlight-pcsx2.html

Gamepad support for Linux!
[ Posted by ZeroFrog 15:55 on 12 12 07 ]
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
www.pcsx2.net/downloads.php?p=plgn

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

USB & FIREWIRE SUPPORT NEEDED TOO!!!

Yeah but the latest binary segfaults on nearly every distribution, plus, getting it to compile is a nightmare. It even depends on nvidia's cg design kit. It's likely that the first linux package we'll be seeing on portage will be 0.9.4.

Hey, there is a new version out- pcsx-9.3 is just for linux and waiting on portage.