True Type are also supported. First of all, Sun's server supports Type 1 fonts only in the .pfa format. It is not a problem at all because you can always get .pfa from .pfb with a zillion utilities floating on the net. You can fetch one of the packages called adobe2mf . The package has pfb2pfa utility in it.
Compilation is trivial.
The next thing you need is to create a file fonts.scale . You can get my quick example , write your own or you can use type1inst Perl script. This file is based on the set mentioned above. It is true ONLY for Sun's X server which I use in my everyday's work. Here is an explanation.