Just a brief entry to share with you a very interesting initiative by Canonical. The company recently released a list of supported hardware, or as they put it, a list of components which Canonical and hardware providers certify for Ubuntu.
In my opinion, this is a much needed reference for anybody interested in Ubuntu, from manufacturers to home users. Anybody can now review the list and find components that should ensure smooth performance, even without trying Ubuntu first (I still recommend using the LiveCD/LiveUSB features before installing in order to confirm that all hardware is supported and working correctly, though).
So there you go, make sure you bookmark this COMPONENT CATALOG so you can take a quick look before you buy your next computer or peripheral.