I hope this is wrong but according to FUD Zilla there won't be any mainstream quad-core Nehalem processors until the fourth quarter of next year. The very high-end parts will be available in the final quarter of this year but FUD Zilla claims you'll have to wait until Q4 2009 for the $200-$300 Nehalem processors.
According to sources close to a motherboard manufacturer, Nehalem CPU in its 1366 socket won't get to mainstream by volume or price until Q4 2009. This might sound shocking to many, as you might expect to upgrade to a quad-core mainstream Nehalem in mid 2009; and unfortunately it won’t happen, at least not for a few hundred Euros / Dollars.
Nehalem will definitely launch as an ultra high-end desktop and server part in Q4 2008 and it will take time until this marchitecture sinks to the attractive $200 to $300 price range.