I got Wah!cade to work today and launch the MAME game Victory, but as expected because Wah!cade needs X, it runs way too slow to be usable on a Pi. But here is how I got it to run if you are interested.
Boot into Raspian.
Run LXTerminal
cd ~
wget http://www.anti-particle.com/projects/wahcade/wahcade_0.99pre8_all.deb
wget http://sheasilverman.com/rpi/raspbian/debs/advancemame-raspberrypi_1-1_armhf.deb
sudo dpkg -i wahcade_0.99pre8_all.deb
sudo dpkg -i advancemame-raspberrypi_1-1_armhf.deb
sudo apt-get install -f
sudo advmame To initialise the app for the first time.
wahcade To initialise the app for the first time.
wahcade-setup
In Wah!cade tab uncheck FullScreen.
In the Emulation tab.
change Application to /usr/local/bin/advmame
change List Generation Method to “Rom Directory”
change List Generation Rom Directory to /usr/local/share/advance/rom
Select File > Save
In LXTerminal
cd /usr/local/share/advance/rom/
wget http://mamedev.org/roms/victory/victory.zip -U Firefox
wahcade
Play around with the settings.
See the readme for more information. http://www.anti-particle.com/projects/wahcade/README
Keys are here. http://www.anti-particle.com/projects/wahcade/KEYS