Tivo Central -> Settings and Messages -> Settings -> Channels -> My Video Providers.
(Was just there myself, so it was fresh in my mind)
"I disapprove of what you say, but I will defend to the death your right to say it"
"Stop slouching! It's two O'clock in the afternoon, PUT PANTS ON!"
"Statistically speaking, there are two Popes per square kilometer in Vatican City..."