Core i7 (codenamed Nehalem) has been released! It combines quad-core with Hyper-threading and SSE4.2 for better multimedia editing. Be warned that Core i7 requires both new motherboard with Intel X58 chipset and DDR3 RAM. It uses tri-channel memory controller for greater memory bandwidth, so remember to get slot in 3 RAM modules rather than 2.
Below are the websites for the Core i7 review: