"Cheesequest" is not an episode. It's a music video that will be featured on the DVD.
But I'm all for everything about the DVD...
They are releasing 2-a-year by the looks of it.
They are making two SpongeBob SquarePants and Foster's Home for Imaginary Friends season DVD releases a year now, which is good. But SpongeBob is divided into volumes, so I hope Foster's never does that. They make new episodes so fast, there's no need to. So I'm just guessing for 2008, season 3 will be released in March, and 4 in September.
Anyways, I'm totally picking this up along with "SpongeBob SquarePants Season 5, Volume 1" on the release date.
(I know. I'm a SpongeBob fanatic, too.
)
Also, there's no doubt that that cover art is a slip-case like on the season 1 DVD, which, upon removal reveals Cheese, Mac & Bloo in the race car on the hill.