Centrino is Intel's new laptop strategy, it includes among other parts the Pentium-M processor which uses way less power than others such as the Pentium-4M, that's why Centrino laptops can be used for 5-7 hours on a single battery.
InfoWorld: "According to Swope, a Linux driver for the heavily advertised Wi-Fi chip set will be released first in a propretiary format and then as open source, once the company has figured out how to hide the workings of its wireless technology.
He did not disclose any release dates however, so for the moment just Microsoft Corp. is reaping the benefit of Intel's huge campaign to push Centrino. We understand that a Linux Centrino driver already exists so the company only has to give the word. That Intel is publicly stating its intention to release a driver for Linux in what is aiming to be a mainstream product is very telling however."