MK3 2006 512M & 1G versions were announced. The 512 is currently being sold (most likely because it is the same PCB as the MK3 2005 512M)
The MK3 2006 512 I have in hand works great, the same as the MK3 2005 512 I have here as well. There is still a ways to go on the software, but what does work, works as it should.