The registration deadline for the 2009 MAMAs has been extended until the end of the month - January 31. All of the pertinent dates have been updated at http://www.themamas.org.
You do not have to have a 2008 recording released to qualify in many award categories including vocalist, instrumentalist (which has been broken out into individual instruments this year), Performer of the Year in your genre, or the overall Artist of the Year (which includes a day of recording at Smart and other winnings).
We will be announcing the performers as soon as the contractual necessities are taken care of. It's going to be a kick-ass lineup, I promise you that.