I had always suspected, but I wasn't sure - so I tracked down a behind the scenes featurette and found out that the Samberg/T-Pain classic was shot on a RED.
Entire Short:
http://www.hulu.com/watch/56632/saturday-night-live-digital-short-im-on-a-boat
Behind the Scenes: (Shot of the RED at :20)
http://vids.myspace.com/index.cfm?fuseaction=vids.individual&videoid=52493697
Entire Short:
http://www.hulu.com/watch/56632/saturday-night-live-digital-short-im-on-a-boat
Behind the Scenes: (Shot of the RED at :20)
http://vids.myspace.com/index.cfm?fuseaction=vids.individual&videoid=52493697