How can I "font-browse" while in design programs?

I have noticed that certain applications provide a font sample when you use a drop-down to choose a new font. For example, when I'm working in InDesign CS5 I see what the word 'Sample' looks like in each font, but in Illustrator CS5 I don't.

I can't remember what every font looks like (just those that I use frequently), so my question is: is there a setting or tool that allows designers to see fonts in those popular design programs that don't actively display the samples beside the font name?