Just learned from PRINT Magazine that iLife and iWork have an OpenType palette. Though it seems you can’t access all open type features (e.g. stylistic alternatives), you can still get to ligatures, small caps and old style & lining figures.
To access the Typography palette: from the Fonts palette, click the gear icon in the lower-left and select Typography.
Oh, and don’t forget the Glyphs palette in Illustrator & InDesign
Enjoy