Yup...all of the above are correct....when you jump a generation you will usually find the total number of pins ont the CPU increase as well as the orientation of said pins. Head over to www.pricewatch.com and find yourself a nicely priced P4 m/b and CPU combo. Best prices ont the net, bar none!
It isn't paranoia when you KNOW they're out to get you...
Yeah all above is corrert and the fact that the ZIF (zero insertion force) socket will be the wrong size and will ovbiously have the incorrect number of pins. And I must be honest prices for P4 chips are ok really at the moment. Get yourself off to a computer fair.