The Dolphins started releasing their pricing for the game in London. They first sent solicitations to the club members, and plan to send it to the rest of the fans at some point (presumably after the club level fans have first crack at them).
There are a limited number of game tickets available, starting at about $100. Then, you're on your own for tranportation and hotel. They also have packages that include a ticket, three nights in a hotel, a pregame buffet, and few other perks at about $3000. My understanding was that this was before airfare.
And about those tickets (without the extras). Season ticket holders can buy them, but they're non-transferrable, and must be picked up in London sometime in the week before the game. Its a way to keep the scalpers getting involved, or so they say.
But, as one astute season ticket holder points out, that's not the way it is with superbowl tickets. As a season ticket holder, you're entered into a lottery, and then have the option of re-selling those tickets.
So, here's what I think: the NFL doesn't want you to come over and see the game. That game is really for locals only, with just a few token americans invited in to watch it.