If I had to define retropunking, I'd say it involves taking something and reconfiguring it so that it looks like a throwback to a specific time period. More often than not, this has been expressed in the way people take contemporary TV shows and rework footage or images from them to look like they're from something else. J.J. Abrams shows seem to be especially popular with retropunks, including this retropunk'd version of the Lost theme ala a mod show from 1967 or this one of Fringe that re-imagines the show as something that should follow Manimal reruns on basic cable early Sunday mornings. And take a look at that Saul Bass-styled Locke poster for Lost. To quote Mr. Griswold: "It's a beaut, Clark!"
Now there's a fun little retropunk'd version of Joss Whedon's short-lived scifi western thing Firefly as if it too were originally aired in the '80s. Fun stuff. Check out the video after the break.