Fudzilla claims to have the final Nehalem specs:

• 3.2GHz will be the highest initial speed grade
• four cores
• two threads per core
• triple channel memory
• DDR3-1333 will be the maximum official memory speed at 3.2GHz
• 6.4GT/s QPI transactions per second
• 8MB of total cache
• 130W TDP
• LGA1366 socket
• Q4 2008 launch

The "6.4GT/s transactions" for the QuickPath Interconnect may refer to 3.2GT simultaneous input and output transactions; and it is interesting to see that it will be launched at the same clock speed as the top Penryn - Intel must be confident in the architectural improvements getting at least a 15%-20% performance advantage to launch at the same clock speed.

In a second article, Fudzilla says two other Nelahems will also be released, a "low end" model at 2.66GHz, and a "medium" model at 2.93GHz.