Today is the launch day for Ivy Bridge. Seems the rumors are correct in that it runs hot and overclocks not as well as SB. Still good if you are looking to upgrade from anything else than SB though. Its expected you can start buying these next Monday the 29th. Some B&M like Micro Center and Frys could potentially start selling earlier.
Hard OCP
Anandtech
Guru3D
Hardware Canucks
Xbit Labs