Seems as though it may be possible that P55 motherboards compatible with Intel's Core i5 CPUs (Lynnfield) may actually start shipping in July.
Core i5 processors are based on the same Nehalem architecture that Core i7 is based upon, but come equipped with integrated dual-channel DDR3 memory controller as well as integrated graphics. The graphics will be based on existing Intel graphics solution, and not Intel's work-in-progress Larrabee.
On that note, many motherboard manufacturers are already showing off samples of LGA 1160 socket based motherboards, anticipating that Intel will begin to ship its LGA1160 CPUs sometime in July. These P55 boards will be the first to support Lynnfield Core i5 CPUs and will support the Clarksdale CPUs as well. This is good news for consumers who want to pinch pennies, as the Corei7s are not flying off store shelves as many have hoped and the cheaper Nehalem more than likely is a better financial choice.
It's speculated that many of these P55 motherboards will make an appearance in the final form at Computex in June, one month before Intel is suppose to release Core i5 CPUs. Of course, Intel may very well push back the release date, thus forcing motherboard manufacturers to do the same, as Intel originally said the chip would launch in late 2009.