Yeah, multiplayer would've been nice and who wouldn't want more quizzes (although updates to the game could bring those), but for $5 on the iPad or $3 on the iPhone, you're getting a trivia game that sucks you in with witty dialogue and clever questions.
The 20 included episodes are far less than the console versions, and due to their linear nature there's not really much reason to replay them multiple times, but the developer seems keen on adding additional episodes and features in updates.
If you like your trivia funny, challenging, and a little risqué, there's simply no better choice on the App Store. Now let's just hope they can keep churning out new episodes as quickly as I can keep playing them.
If you like your trivia with a healthy side of snark and a touch of risque, age hasn't mellowed You Don't Know Jack one bit, and it emerges onto the app scene as a very smart and sharp challenge for grown-ups.