Nice. If you ever wanted to see every P4 CPU, broken down by core architecture (Willamette, Northwood, & Prescott), in tabular format, then head on over to HardwareSecrets, because somebody was busy over the weekend, & they've got it all laid out for ya.

"Intel Pentium 4 Processor was released in November 2000, using Intel’s seventh x86 microarchitecture, called Netburst. Pentium 4 processors can be found in three different core versions: Willamette, Northwood and Prescott. In this tutorial we will talk about each core version and list all Pentium 4 models released to date."