I wrote some code to list the fonts on my iPad (iOS 3.2) for quick reference
Bodoni Ornaments
BodoniOrnamentsITCTT
AppleGothic
AppleGothic
Gill Sans
GillSans-BoldItalic
GillSans-Bold
GillSans
GillSans-Italic
Hiragino Kaku Gothic ProN
HiraKakuProN-W6
HiraKakuProN-W3
Palatino
Palatino-Italic
Palatino-Bold
Palatino-Roman
Palatino-BoldItalic
Copperplate
Copperplate-Bold
Copperplate
Bodoni 72 Smallcaps
BodoniSvtyTwoSCITCTT-Book
Bradley Hand
BradleyHandITCTT-Bold
Heiti K
STHeitiK-Light
STHeitiK-Medium
DB LCD Temp
DBLCDTempBlack
Helvetica
Helvetica-Oblique
Helvetica-BoldOblique
Helvetica
Helvetica-Bold
Marker Felt
MarkerFelt-Wide
MarkerFelt-Thin
Times New Roman
TimesNewRomanPSMT
TimesNewRomanPS-BoldMT
TimesNewRomanPS-BoldItalicMT
TimesNewRomanPS-ItalicMT
Verdana
Verdana-BoldItalic
Verdana
Verdana-Bold
Verdana-Italic
Hiragino Mincho ProN
HiraMinProN-W3
HiraMinProN-W6
Zapf Dingbats
ZapfDingbatsITC
Georgia
Georgia-Bold
Georgia-BoldItalic
Georgia-Italic
Georgia
Arial Rounded MT Bold
ArialRoundedMTBold
Papyrus
Papyrus
Trebuchet MS
TrebuchetMS-Italic
Trebuchet-BoldItalic
TrebuchetMS
TrebuchetMS-Bold
Baskerville
Baskerville
Baskerville-Bold
Baskerville-Italic
Baskerville-BoldItalic
Heiti TC
STHeitiTC-Light
STHeitiTC-Medium
Geeza Pro
GeezaPro-Bold
GeezaPro
Bodoni 72
BodoniSvtyTwoITCTT-Bold
BodoniSvtyTwoITCTT-Book
BodoniSvtyTwoITCTT-BookIta
Courier
Courier
Courier-Oblique
Courier-BoldOblique
Courier-Bold
Cochin
Cochin-BoldItalic
Cochin-Italic
Cochin-Bold
Cochin
Heiti J
STHeitiJ-Medium
STHeitiJ-Light
Arial
Arial-BoldItalicMT
Arial-ItalicMT
ArialMT
Arial-BoldMT
Arial Hebrew
ArialHebrew
ArialHebrew-Bold
Courier New
CourierNewPS-BoldMT
CourierNewPS-ItalicMT
CourierNewPS-BoldItalicMT
CourierNewPSMT
Zapfino
Zapfino
Academy Engraved LET
AcademyEngravedLetPlain
Chalkduster
Chalkduster
Bodoni 72 Oldstyle
BodoniSvtyTwoOSITCTT-Book
BodoniSvtyTwoOSITCTT-BookIt
BodoniSvtyTwoOSITCTT-Bold
Hoefler Text
HoeflerText-Black
HoeflerText-Italic
HoeflerText-BlackItalic
HoeflerText-Regular
Futura
Futura-Medium
Futura-CondensedExtraBold
Futura-MediumItalic
Snell Roundhand
SnellRoundhand-Bold
SnellRoundhand
American Typewriter
AmericanTypewriter
AmericanTypewriter-Bold
Heiti SC
STHeitiSC-Light
STHeitiSC-Medium
Optima
Optima-BoldItalic
Optima-Regular
Optima-Bold
Optima-Italic
Helvetica Neue
HelveticaNeue
HelveticaNeue-BoldItalic
HelveticaNeue-Bold
HelveticaNeue-Italic
Party LET
PartyLetPlain
Thonburi
Thonburi-Bold
Thonburi
Didot
Didot-Italic
Didot
Didot-Bold