Instant dictionary/Wikipedia definitions in Safari

[Starfox]

Double-tap with three fingers on a word / selection in Safari / Lion and you'll get a pop-over with its dictionary definition and Wikipedia search summary - did anyone else discover that before?

[mrapplegate]

Double-tap with three fingers on a word / selection in Safari / Lion and you'll get a pop-over with its dictionary definition and Wikipedia search summary - did anyone else discover that before?

Yep, it's been mentioned here and other sites. But still worth reminding people about :D