We'll admit it, we had an idea Microsoft's just-announced Xbox 360 Arcade was coming. What we didn't expect was that it would be accompanied by a flood of family-friendly content headed to the Xbox Live Video Marketplace. Along with standard-def content from Nickelodeon, Warner Bros. will make 50 high definition episodes of Looney Tunes available for download. Of course, owners of the new Arcade unit won't be able to download the shows without a HDD, but why sweat the details (like pricing, which wasn't mentioned)? The new content hits "starting today", but doesn't appear to be up just yet, so keep an eye out for Acme-brand items landing on your HDTV.