
(urg, tables chopped off the end)
You click that banner, and it leads you through a few steps to register for...a user.dreamcast.com Gmail account. Bear with me. Instead of a username, you punch in your DC's serial number (hint: flip the system over, look towards the bottom). When you enter the details, they email your login info and a little later, the place where you log in once they approve your account. For now, that's as far as it goes.
So, cue the guessing games. I interpret this as Sega using it to take a headcount, a gauge for demand of something DC-related they're thinking of doing - and i'd say that demand is pretty damn high because as i'm typing this, they've stopped registrations due to overwhelming volume. It's prolly something they've been planning for a while, at least since they updated the DC trademarks.