Update:

I had the Alias designer try sending me an .igs file. I couldn't open it in either the current version of MOI, nor the v3 Beta I have. No warnings, simply nothing imports. Just to make sure that the file wasn't corrupted, I tried Rhino, and it came in perfectly.
Any ideas? Are the IGES issues with MOI? Or are there export steps needed to write the correct file from Alias?

Thanks.