This is something I’ve been wanting for a while now – the Xbox Live DRM utility now functions properly. As some background information, when you download video or games from Xbox Live Marketplace, the content is licensed to two places: your Gamertag online, and your console by its serial number. If you change consoles, you can only access content if you’re signed into Xbox Live under that original profile.
For me, this was a major problem because I’m now on my fourth Xbox 360 – two exchanged through EB’s warranty program for faulty disc drives, plus a functional unit that I sold so I could upgrade to an Elite with 120GB hard drive and HDMI. As a result, some of my Rock Band tracks were licensed to the previous console and some to the new one. Offline play at a friend’s place was severely hampered and the game always required my acount to be signed in to access the content. No longer, though!
Check out Major Nelson’s post on the process, or hit up the license migration page. All my content was relinked to my 360 Elite properly and there should be some good times with Rock Band in the near future.