This is one of those simple but brilliant ideas whose only mystery is that someone didn't think of it sooner.
App For That is a website that lets you read, submit, and just giggle like a lunatic over hilarious variation's on Apple's "There's an app for that" App Store commercials. (The above screen cap came up just at random, but as a lifelong Blue Oyster Cult fan, it was too good to pass up.)
You can give LOLcats-style thumbs-up or thumbs-down on any of the entries that pop up, email 'em to a friend, even propagate 'em on Facebook and/or Twitter. The site, however, does NOT automatically filter out recycled "You Might Be A Redneck" setups, so proceed accordingly.
"But can you actually, y'know, find this in the App Store?"
Well…unfortunately, there isn't an app for that. Yet.
(Note: the site won't work on older versions of Internet Explorer, and in fact strongly suggests you switch to Firefox, Safari, Chrome — or IE8, in a pinch. On Blackberries, the built-in browser and Opera Lite will display the current quip, but the grading/linking code doesn't work, and you have to manually refresh the page to get new submissions.)