Xavier is that right?
Didn't you ever heard of the cancel of a pc version?
Well.. this site has munch's preview for pc:
http://pc.ign.com/previews/14213.html
And if you look at the release date it says:
Cancelled -- Xbox exclusive
But also in the demo page on oddworld.com there was munch's oddysee with the sign COMMING SOON, but that was before the cancel and now OWI took it off because of the cancel.
We can only hope for that OWI decides to make again a pc version.