Harmonix will be treating Xbox Live owners to the long-awaited Grateful Dead downloadable content this week.
Those included are: "China Cat Sunflower", "Casey Jones", "Sugar Magnolia", "Truckin'", "Franklin's Tower", and "I Need A Miracle".
Each can be bought for 160 Points (GBP 1.36 / EUR 1.92), or the entire pack for 800 Points (GBP 6.80 / EUR 9.60).
That means you essentially get one track for free if you buy the whole lot.
There's no word on a PSN release for these, bizarrely, as usually both are released hand-in-hand in the US.
Rock Band is yet to be released in Europe, with Q2 2008 the only date EA will mention.
Pop over to our Rock Band gamepage for our import review and videos of us playing it.