Intel Confirms 45nm Tape-Out, Third 45nm Fab for 2008
 

A statement sent to DailyTech reads "Paul [Otellini] said we have working samples of the Penryn processors -- and in a short period of time have already booted 4 operating systems (Windows Vista, XP, Linux and Apple Mac OS-X)."

http://www.dailytech.com/article.aspx?newsid=5739

there is a reason why they can still beat the analysts estimates despite the price war