This week's DLC for $1.99 per song (160 Microsoft Points) or these songs can also be bought in a 3-song Classic Rock pack for $5.49 (440 Microsoft points). PS3 Store should be back up on Thursday so these tracks should come out then as well along with the last two weeks of DLC that they've missed.
"Call Me" by Blondie (master)
"Simple Man" by Lynyrd Skynyrd (master)
"Message in Bottle" by the Police (master)
You can discuss the coming week's dlc here.
As always history on the DLC can be found at Rockband.com/Life
And DLC Credits can be found here