Could you describe your experiences from one or the other. I've done a lot of searching and it seems more people use Mapserver but there are many people really like MapGuide a lot... Mapguide also seems to be a little behind on documentation... Latest version of documentation is 2.0 and the official release is 2.2. I've tried doing the tutorials but they seem to be behind and break, or don't work at all for the new version of MGOS.
I guess my question is... What one do you recommend for an enterprise system?