In a rather muted fashion nVidia have started to ship the Tesla C2050 – the first Fermi based Tesla cards. The C2050 has 448 cores and 3GB of GDDR5 memory onboard. While 3GB sounds a little lower than expected this is because they have modded the PCB to allow for Error Checking and correcting.
nVidia have stated that the 3 billion transistor chip reaches industrial grade reliability after fusing off three SM clusters with 32 cores in each of them. The company has remained tip lipped about the number of cores until very recently and it apparently even caused a lot of internal confusion among the ranks.