More than a couple Podcasts recently have commented about how only the Renegade Edition of DJ Hero has a table which would benefit the user as a place to keep the controller. Long ago, I had to solve this issue with Beatmania. Ladies and gentlemen, remember these?
That's right, a TV tray. At your local general merchandise store (Meijer, Walmart, Target), you can snag one of these babies for about $20-$30. While you're at it, grab some nonslip grip sheets from the kitchen area, and bammo, you not only have a perfect height DJ Hero/Beatmania/Scratch controller base, but dig this, it also works well for steering wheels and Steel Battalion controllers. Even flight sticks. In other words, it's going to probably be one of your most used non gaming gaming peripherals.
Cheers!