Nothing will compare with the 'Unofficial "I'm waiting for Arrandale"' thread that ran for about a year until the Arrandale MBP release in April 2010. It was a very entertaining thread consisting of 7 parts for a total of about 37,000 posts and over a million reads. After the Arrandale CPUs were introduced at CES in January 2010 it really heated up with the weekly cycle of anticipation each Monday, followed by the Tuesday morning letdown posts.
I was mildly interested in a MacBook Pro, and was perusing all the forums. It was this series that got me hooked on MacRumors. I finally bought a 15" 2.8 GHz i7 MBP with the antiglare hi-res screen in Nov 2010.