Finally Intel Core i7 processors and the X58 motherboards are on sale. NewEgg lists 3 Core i7 CPUs and 8 X58 Motherboards to choose from.
If you do not want to fool around you should of course get the top of the line Intel Core i7 Extreme Edition 965 3.2GHz CPU selling for a hefty $1,069.99.
The most affordable Core i7 CPU Intel Core i7 920 2.66GHz selling for $319.99.

On the motherboard side of things new X58 Motherboards from Asus, Gigabyte, MSI, Intel are available to choose from. The most expensive available on NewEgg right now is the ASUS Rampage II Extreme LGA 1366 Intel X58 ATX Intel Motherboard selling for $398.99.
More details on NewEgg.

If you are not into building your own high performance desktop PC, Amazon has several cool looking Core i7 PC Systems on sale now.