I'll try to guess why not...
Most people (players, not modmakers) would be reluctant to use it or will be abusing it. They know how to use forums, but not Bugzilla.
You'll have to integrate Bugzilla in Bio forums (would Bioware want to do it?), otherwise people would have to create yet another account.
Creating Bugzilla would be bad PR because it means for Obsidian to directly admit that game is not of production quality.
What else?
Is it going to be competing with NeverwinterConnections?
PS
Maybe it is just me, but I don't like Windows XP silver bars.
PPS
Any specific reason for choosing DotNetNuke instead of something PHP based?
I think the bigger issue here is that all copy protection schemes use kernel level code, which is not what Wine (or Cedega) does. As far as I can see, it will require to implement the whole new extension that will load wrapped Windows drivers (like NDIS wrapper Linux kernel module).
Well, it is not as simple as inserting the CD and pressing a button, but yeah, it pretty much summarizes what Cedega is, a commercial WINE spin-off, that focuses on running games on Linux.
Hmmm, I remember a Microsoft employee claiming that it is based on hardware serial number (which should make replacing of faulty components add up to your points though). But it was related to Vista.
I remember I've read somewhere a point system that outlines the cost of various hardware upgrades in points (with motherboard costing the most, of course). After reaching a certain limit, your system becomes "new" in respect to licensing. Now only if I remembered the link... so don't take my word for it, yet.
I always wondered what Visual Studio people use for version control. All other IDEs that I used have some kind of CVS or Subversion plugin, does Visual Studio have it?
I thought I'd weigh in my own truly objective statement based on results of rigorous research for the past years and hence being The Ultimate Truth About NWN1 Interface:
NWN1's interface is better, but radial menu sucked. I'm glad it has died a horrible death.