It does have something to do with Perl, in a roundabout way - SOAP is fully compatible with MS COM and (in theory) can be used as either a .NET server or client. I've never tried it, I've just read the reports.

Also, there is a 'dotGNU' project. How this differs from 'mono' I'm not to sure, but you can read about it here.

Update: After bouncing around the net for a while, I found the homepage here. The author calls for someone to implement a new crossplatform virtual machine that compiles under gcc. Perl sounds sufficient, and already has many of the libraries needed.

Anyone who feels bored and in need of something to hack on should take a look at the page.