Ubuntu 7.10 (Gutsy Gibbon) was released yesterday. Overall the improvements are huge. Amongst other things driver support for my aging four year old laptop is nearing perfection.
The only thing that did not work out of the box is my trusty Keyspan USA-19HS USB to DB9 serial adapter. Primarily my laptop is used as a portable tool for on-site network administration. This work often involves configuring various enterprise grade hardware via a serial console. Needless to say, this is functionality I depend on.