Wow...
I really don't know how to respond to that. That's more restrictive than I'd ever imagined the GSL would be. I'm amazed that's even legal, to put in a clause that your business must forsake the OGL entirely to use the GSL at all.
Remember that animosity towards WotC that people were saying they felt before before? I wonder if they feel anything right now.
Clark, this is the first I've heard that you'd be interested in doing any sort of 3E stats for your 4E materials. It's a pleasant surprise, though it doesn't seem likely to happen now. Would it make a difference if they were free downloads, rather than pay-for-downloads? Likewise, would it be legal if Paizo released those materials, even if they were written by you?
Either way, I'm happy to hear that you've at least got new 3E stuff on your mind.