New Fonts in Windows Vista
http://www.hyperwrite.com/Articles/showarticle.aspx?id=64

Self, Tony
HyperWrite
2006

Abstract:

Seven new fonts will make their public appearance in Office 2007. Segoe UI will be used as the Office user interface, and will also be the font used throughout the Windows Vista user interface. For documents produced by Office, Calibri (a sans serif font) is recommended for headings, with Candara (a humanist sans font) recommended for sans body text, and Cambria for serifed. Consolas is a monospaced font, while the remaining two having characteristics that suit particular types of paragraphs.