Back in Feburary 2009, Intel disclosed that the 32nm 'Westmere' desktop processors were coming out in the fourth quarter of 2009 and that appears to still be true. Arrandale and Clarkdale are the first two Westmere cores that will be introduced to the market. Both Arrandale and Clarkdale are dual-core Westmere parts, but the difference between the two is that Arrandale is for mobile platforms while Clarkdale is for the desktop market.
Quote: "Intel had a couple systems showing off the upcoming Clarkdale processor (Core i3), at this year's IDF show. The first system we spotted that happened to be running Clarkdale was the concept HTPC shown above with a mini-ITX motherboard. Intel had a reference mini-ITX H57 motherboard that they were showing off behind closed doors that we also got to spend a little time with. The layout of this reference board is a little different than most Intel mini-ITX boards that are currently on the market since it does not need a north bridge chipset..."