Bit Tech uncovered lots of details of Intel's upcoming 32nm Sandy Bridge architecture, you can read it over here.
Sandy Bridge CPUs will be based on the current 32nm, second generation High-k metal gate manufacturing process, but will include new architectural features such as AVX - Advanced Vector Extensions - and AES - Advanced Encryption Standard - acceleration and will arrive in Q1 next year, with possibly very limited products popping up late Q4, although depending on who we talk to the story changes.
They will be split into two markets: mainstream and enthusiast. The mainstream models will replace the current LGA1156 'H1' Clarkdale and Lynnfield CPUs (Core i3 and Core i5) and will use LGA1155 'H2' packaging.
Yes, that's right, LGA1155 - one fewer pins than current LGA1156 CPUs. These sockets are NOT compatible, so you cannot use an existing LGA1156 CPU in a new motherboard or visa versa. Not only is the position of pin-1 different, the socket notch has moved from 9mm to 11.5mm from the centre and the entire voltage plane layout has changed.