Turns out there's an aricile on the cystal website that describes this problem. It said my problem was the lack of a virtual directory called crystalreportwebformviewer pointed at the crystal viewers directory. However, even after re-installing .NET framework and SP2 as well as the slammer patch, then reinstalling my web setup and creating the virtual directory ( and restarting IIS ), I get nothing.

I'll try rebooting my server, then I'm giving up and calling crystal, unless you or Craig has any other ideas.

All in all, I think this is rather ridiculous that it takes so long to get this thing configured, and that the actual instructions are so vague and hard to find.