Cleveland's e-mail address is ClevelandBrown@clevebro.com
When Roberta is watching Cleveland ghost riding with his car, the link shows http/www.com.
Unlike most of Seth MacFarlane's shows, the schools in this show are not named after celebrities, which was a well-known running gag throughout both Family Guy (e.g. James Woods Regional High School, Buddy Cianci, Jr. High School, Martin Mull Elementary, etc.) and American Dad! (e.g. Pearl Bailey High School). The high school is just named "Stoolbend High School".