I'm having some difficulties getting a fresh install to work. The webserver isn't starting. I decided to reinstall it and saw this on uninstall:

Starting Removal of PiMAME :( ....
Reading package lists...
Building dependency tree...
Reading state information...
Package 'lighttpd' is not installed, so not removed
Package 'php5-cgi' is not installed, so not removed
Package 'vsftpd' is not installed, so not removed
The following packages will be REMOVED:
imagemagick
0 upgraded, 0 newly installed, 1 to remove and 0 not upgraded.
After this operation, 509 kB disk space will be freed.
(Reading database ... 84009 files and directories currently installed.)

So it looks like the install process failed totally. Pimame itself runs and plays Grid, but that's about it.