Microsoft did a fair bit of work to come up with readable fonts for Vista and Office 2007. Candara, Consolas, Calibri, Cambria, Constantia and Corbel are very pretty fonts for Vista but they are also bundled with some of Microsoft's free downloads.
Download either the free Microsoft Powerpoint 2007 Viewer or the Microsoft Office Compatibility pack - both the software downloads include the new Windows Vista fonts. Either install the updates or unzip the EXEs and then the CABs to find the TTF files.
Powerpoint 2007 Viewer
Office 2007 Compatabilty Pack
Be aware that the fonts are very pretty and nice to use for screen documents etc. but they may also be associated by your reader with Vista modernness etc... Still they're nice clear fonts.
Who has been looking for a good FREE Font resource to share - and is now satisfied.