Well, yah...the links that were posted were pretty straight-forward. To have a centrino laptop, you have to have the wireless support, the processor (Pentium M), and then the special intel chipset...
Really, though, rnmcd, I wouldn't just shrug it off and "nothing special." I remember playing on a P4 M (note, quite different from a Pentium M -- the 4 makes a huge difference), and it sucked! The battery life was absolutely horrendous. The computer was huge, bulky, heavy, and maybe it was "fast," but it ran super hot. The Centrino I own (IBM t40) is amazing. I can stretch the battery life to 5 hours, and if I buy a 9 cell battery, I can probably stretch it more than 7 hours (at least I believe I've read the 7 hour figure).
It's a great idea, and personally I can't why anybody would buy a non-Centrino laptop (except maybe an AMD mobile processor...I've heard "okay" thinks about those, nothing exceptional). The pentium 4 processors that manufacturers put in laptops are just ridiculous... They're hot and they absolutely eat a battery for lunch...
Just my $.02 worth.