DailyTech has received leaked specifications for the upcoming 45nm Xeons, and they look sweet. I think of most interest, to me at least, is the E5450 3.0GHz Quad-Core, with a TDP of just 80W. In speed, it's similar to the QX6850 that we posted a review for today, but with better power efficency and also 12MB L2 cache. All these processors are based on Penryn, so they would all feature an SSE4 instruction set, High-K MG transistors and a 1333Mhz FSB.
http://www.dailytech.com/article.aspx?newsid=8065
http://www.dailytech.com/article.aspx?newsid=8065