Any old (correct) Verilog source that you can release (with simulation output/VCD files) is useful for testing. If you can put it on an FTP site and e-mail us or the Yahoo-Group. SDF files are also useful (with or without the supporting Verilog).
Help with porting (we are currently limited to X86 and Sparc), either by downloading, building and testing the software or by donating time on your hardware.