Rock Band DLC (Tuesday) - Pantera - The Great Southern Trendkill - Pantera - War Nerve - Pantera - Drag the Waters - Pantera - 10's - Pantera - 13 Steps to Nowhere - Pantera - Suicide Note Pt. II - Pantera - Living Through Me (Hell's Wrath) - Pantera - Floods - Pantera - The Underground in America - Pantera - (Reprise) Sandblasted Skin
Just Cause 2 DLC (Tuesday) - Black Market Boom Pack (160 pts)
Demo (today; free; currently only available to Gold Members) - Green Day: Rock Band - includes two songs: Welcome To Paradise and Boulevard Of Broken Dreams - When you exit the demo, you're treated to the revelation that Rock Band 3 (which is coming this fall) will include keyboards as a playable instrument
Also, the Rock Band 3 keyboard I mentioned earlier in this thread may, in fact, be a keytar. That same article also claims there will be a "pro" mode, which "will require proper technique, and may lead to actual skills on guitars and bass. How this will work isn't known, but it's possible Mad Catz may create a product that more closely mimics an actual guitar."
Getting close to the release date and I'm thinking hard about either the 360 or Wii version. Hard to know for sure without reviews, but the Wii version certainly has some cool extras this year. http://wii.ign.com/articles/810/810569p1.