According to our sources, P67 boards should reach retail markets as early as Mid November 2010.
Although the boards will appear on the market, the new processors with 1155 is slated to be lanuched in January 2011 or so. The new embedded graphics on these processors is said to have a 25% improvement in performance over the current LGA1156 processors.
Currently, Intel P55 and H55 boards support overclocking. Unfortunately, the next generation H67 will not support overclocking. So, if you need to overclock, you would have to go for discrete solution, the P67.
Stay tuned to ocworkbench for more updates on these upcoming chipsets and processors.