Besides lots of details about the Penryn, Intel also announced more info about their new Nehalem architecture. This 45nm high-k metal gate transistor based processor features lots of good stuff.
Let me wrap up some of the more interesting details:
Integrated memory controller
Some Nehalem processors will get an integrated graphics chip.
SSE4 instruction set
Parallelism, will support up to eight cores per physical processor and some sort of Hyper-Threading to allow 2 threads to be executed on one core. So basically you'll be able to run 16 threads at the same time on one processor.
Multi-level shared cache like the Penryn
No FSB but a new HyperTransport-like system.
45nm with high-k metal gate transistors
New socket will be required
It looks like Intel is taking over some of AMD's old and new tricks. AMD's processors already feature integrated memory controllers and the firm is also working hard on a GPU/CPU chip.