Even though Intel recently pushed back the launch of the Core i5 processors, information about the replacements for the Core 2 Quad and Core 2 Duo chips are starting to surface.
At launch, Intel should have three models available, all 45nm parts based on the Lynnfield core. They should all be quad core chips with HyperThreading, utilized dual-channel DDR3 designed for DDR3-1066/1333, and will have 8MB of L3 cache with support for TurboBoost.
The three chips will all be clocked below 3GHZ, coming in 2.66GHz, 2.80GHz, and 2.93GHz clock speeds. Prices will be $196, $284, and $562 respectively, which seems quite high considering what Core i7 has to offer.