Nah. Didn't think you were being a smartass. It's just that Intel are useless at actually specifying what Centrino actually is in terms of hardware...
To be called a Centrino platofmr then you must have a P4M processor, a specific mobile chipset and the Intel PRO 2100 board. It's a mini-PCI board as well but according to Intel it's "special". I've not got one so you could be correct and it's just a standard mini-PCI 802.11b board. The more I look into it, the more likely it seems!
Bah. Finally found the chipset documentation and it does seem to be a normal mini-PCI card! So ignore me