http://www.tgdaily.com/images/stories/article_images/intel_roadmap/intel_07_08.jpg
Thought Penryn was going to end up being quad-core for the 45nm shrink. Didn't realize it was only for mobile processors.
Looks like Wolfdale and Yorkfield (due to Kentsfield for the current Core2 socket LGA775) are going to be the main processors enthusiasts will be looking at. I'm figuring Wolfdale DP and Harpertown (due to Clovertown for the curren Xeon socket 771) are the server class chips.