I've seen their ads on non-WGN shows (HGTV?). They've got an animated commerical now with the old guy's voice. Same jingle, but they quickly mumble "800" before doing the "588-2300 Empire!"
I assume that they contract-out installation to locals for those who don't live in Chicagoland, as they claim they do the installs the next day.
Cheers,
Scott.