Hey, It's That Voice!: The voice cast for Sonic For Hire is extremely familiar to skits in "Dorkly Bits" and "College Humor". In fact, in some skits that feature Tails, he is voiced by the same exact voice actor.
If you subscribe to their Facebook page, they sometimes post about (as if Sonic was typing the status) various things that happen outside of the episodes. Between Season 3 and 4, Sonic got into a serious crack addiction, which is mentioned in the first episode of Season 4. What does Sonic do after Tails treats him like shit at Burger Time? He smokes crack in the bathroom, burns the place down, and steals Knuckles's moped for crack money.