Jay,
I noticed that you mentioned Newegg doesn't have the Northwood core CPU...No I haven't finished reading the thread but...here it is with the Newegg part number and the cost is $180 for the retail box on this CPU.
Intel Pentium 4/ 2.8C GHz 800MHz FSB, 512K Cache, Hyper Threading Technology - Retail
Model# BX80532PG2800D
Item # N82E16819116161