The Cavaliers did not announce this, but there is some indication that each exhibition game will be broadcast on Fox Sports Ohio.
EDIT: I apparently can't read. The article linked to above at Cavs.com says that while the broadcast details will be released later, they will all be on Fox Sports Ohio.
The preseason schedule itself should be pretty fun. The Cavs will open on October 5 against new head coach David Blatt's former team, Maccabi Tel Aviv. So that will be pretty cool. It's a home game, and I'm guessing the Q will be packed for LeBron James' unofficial return home. It will likely be difficult for the folks at Quicken Loans Arena to keep things in check from an all out season opening party with the Cavaliers new intro and all that.
They then travel to Brazil, the home of Anderson Varejao, to face off with the Miami Heat. Dwyane Wade and Chris Bosh, as well as Erik Spoelstra are of course still in the Heat organization. The Cavaliers will also continue their tradition of playing games in Columbus and Cincinnati. LeBron James already has a locker at Ohio State, so the transition should be easy.
It's still a couple months away but I can taste it!