Hmm I've gone every year (for last three years I only) as well, and haven't gotten an opportunity to early register. Hell I'm even a Glass Explorer that went to the San Francisco Foundry.
Yeah, I was kind of hoping for some sort of early buy-in opportunity for the Glass Explorer group but I guess no such luck (unless they clue us in between now and EOD Tuesday I guess).
I'm going to be bummed if I can't get a ticket and there's a lot of Glass dev content at the conference. I didn't have the time to go to either Foundry event.
