Verdana is certainly shipped in WinVista, but the new "cleartype collection fonts" are the new standard; they look much better, they are used in the operating system, and they are the default fonts for documents created in Office2007--so webpages that do not list the newer fonts as first choices in font families will run the risk of looking old-fashioned in Vista. The problem is that when I specified a font family as
body {font:normal 100.01%/1.6 Candara,Verdana,Arial,'Lucida Grande',sans-serif;}
the Candara (new Vista font) looks smaller at the same size than does the Verdana (old XP font). I almost need to specify different sizes for different fonts, unless I'm using the wrong equivalences. (I'm looking at the same webpage with the same CSS on two machines side by side, both running WinXP, one with the new fonts installed and one without.)
Michael Kaplan has given a list of what he calculates are "the 290mb and over 712,000 glyphs contained in the Vista fonts":
Core Fonts:
Arial
Courier New
Times New Roman
Symbol
Wingdings
Core UI Fonts:
Microsoft Sans Serif
Segoe UI
Tahoma
ClearType Collection Fonts:
Calibri
Cambria
Candara
Consolas
Constantias
Corbel
Other Western Fonts:
Arial Black
Franklin Gothic Medium
Georgia
Impact
Lucida Console
Lucida Sans Console
Marlett
Palatino Linotype
Segoe Print
Segoe Script
Trebuchet MS
Verdana
Webdings
East Asian Fonts:
Batang/BatangChe
DFKsi-SB
Dotum/DotumChe
Fangsong
Gulim/GulimChe
Gungsuh/GungsuhChe
KaiTi
Malgun Gothic
Meiryo
Microsoft JhengHei
Microsoft YaHei
MingLiU_HKSCS/MingLiU_HKSCS-ExtB
MingLiU-ExtB/PMingLiU-ExtB
MS Gothic/MS PGothic/MS UI Gothic
MS Mincho/MS PMincho
SimHei
Simsun/NSimsun
SimSun-ExtB
Arabic Fonts:
Andalus
Arabic Typesetting
Microsoft Uighur
Simplified Arabic
Traditional Arabic
Hebrew Fonts:
Aharoni Bold
David
FrankRuehl
Gisha
Levenim
Miriam
Narkisim
Rod
Thai Fonts:
Angsana New/AngsanaUPC
Browallia New/BrowalliaUPC
Cordia New/CordiaUPC
DilleniaUPC
EucrosiUPC
FreesiaUPC
IrisUPC
JasmineUPC
KodchiangUPC
Leelawadee
LilyUPC
Indic Fonts:
Gautami
Iskoola Pota
Kalinga
Kartika
Latha
Mangal
Raavi
Shruti
Tunga
Vrinda
Other Fonts:
DaunPenh
DokChampa
Estrangelo Edessa
Euphemia
Microsoft Himalaya
Microsoft Yi Baiti
Mongolian Baiti
MV Boli
Nyala
Plantagenet Cherokee
Sylfaen
(I'll repeat that the new Vista fonts work on Windows XP, and they are available free from Microsoft as part of the "Office Compatibility Pack" linked above from the original posting, so anyone can preview Vista fonts in webpages while still using XP.)