I noticed this article on The Code Project this morning. It provides wrappers to make windows forms controls appear with the new Vista styles (when used in Vista). The nice thing is that they degrade properly for use on older versions of Windows.

The other nice thing is that it provides a version of the Command Link control for use on Windows XP (see picture below). Command links are a nice addition in Vista which I've already had a few uses for. In fact I had already started my own implementation in windows forms because I hadn't found any acceptable solutions. From my quick glance at this article it looks like I might be able to throw that away and use this instead.

Command Links

Other Vista vs XP Controls