This article is from the of the muppets FAQ, by Craig Silverstein with numerous contributions by others.
It's the most recent Muppet TV show. Originally it was on ABC, then the Disney Channel, but alas it's no longer showing in the US.
Not that we're biased, but "Muppets Tonight!" is *great*. We all love Bobo, and Johnny Fiama (possibly Fiamma) and Sal (Minella -- ha ha), and Pepe and Seymour, and even Garth Brooks! Alas, the broader public did not agree, and no new episodes are being produced.