In a short interview with Jeff Waugh, infoworld covers that Ubuntu is working on improving power management.
Read it here
Jeff said that Thinkpads are still the most popular laptop for Linux and “since they are mostly all Centrino based it's a big advantage as Intel open-sources the drivers. This makes those specific drivers more manageable in an open source distribution. Power management is still a bit of a bleeding-edge issue simply because its so new-that's something that was realized at the OSDL Desktop Architect meeting and has since become an important thread of development.”