As a quick note for those unfamiliar with the Core i7 series that was recently introduced by Intel, it breaks compatibility with LGA-775 parts by bringing forth the LGA-1366 socket, is exclusively bound to using DDR3 memory, introduces the Quick Path interface, and it brings back Hyper-Threading Technology.
In this Phoronix Forums thread is feedback from owners already of the Core i7 CPUs and Intel X58 motherboards with their Linux encounters.
On Phoronix Global are also a number of Core i7 benchmark results under Linux using the Phoronix Test Suite. From the search page just plug Core i7 into the processor field or QuickPath into the Chipset field. Here are some universe-x results, here are some DDR3 + Core i7 memory tests, and here are some computational results. Be sure to check out Phoronix Global though as there is over 30 sets of results uploaded already.
We hope to be delivering our detailed Linux review of the Intel Core i7 + Intel X58 Chipset in the near future.