Well, like the title says. Here's some I've noticed so far.

Sesame Street/Kermit the Frog:
In Walse, a frog says "It's easy being green, dig?".

Star Trek:
When Galuf and Krile are reunited nearing the end of your quest on World 1, Galuf says "Krile...You're...Krile...!"

Reading Rainbow:
A scholar at Walse says "But don't take my word for it, take a look, it's in this book!"

Michael Jackson:
The description for the dancer job reads "Fighters whose smooth moves confuse enemies, leaving blood on the dance floor"