So. You need some time-wasters. Here’s one that’s distracted me for several minutes: YouTube Doubler, which allows you to play two clips on Google’s (GOOG) video site at the same time.

Why would you want to do that? My first thought was that it would make the “Is it true that ‘Dark Side Of The Moon’ syncs up perfectly with ‘The Wizard of Oz’?” question easier to answer. But someone’s already tackled that one. (Of course. Also, it appears the answer is “no.”)

Second thought: I bet you can do some good stuff with Microsoft (MSFT) CEO Steve Balllmer’s famous dance video. So here’s my attempt. Note that you may need to bring the volume up on the left hand clip while bringing it down on the Ballmer clip; also, the Ballmer clip won’t autoplay itself. What do you want? It’s in beta.

Can you do better? Probably. I’m particularly fond of this creation: Hank Paulson Vs. Milking Cow, via the YouTube Doubler favorites page.

If you’ve got a mashup you want to share with the rest of us, leave the URL in comments below, or email me: peter@allthingsd.com.