It's not really a dying fad, it's just changed from being in-your-face to running in the background. Not to mention that Facebook is just the next logical step in a process that goes website -> Facebook -> Mobile devices.

the good thing about Facebook is that it links together our marketing model with the medium. being able to take advantage of that effectively will be good.

Just as a quick FB update -> everything is working nicely to create an account and play through facebook.... I'm just working on the recruiting system. You'll be able to invite people to your tag, your server, the game in general or send pact requests (non FFA) via Facebook.
We're focusing on making the experience for new players a better one, as right now it's a little daunting to get involved in the game. This was a major problem Earth had for years -- a steep learning curve.