So today Stephenie's site announced:
The first single on "The Twilight Saga: Eclipse - Original Motion Picture Soundtrack" has just been confirmed and I get to bring you the exclusive details. Stephenie's very favorite band, Muse, has contributed a song called "Neutron Star Collision (Love is Forever)" and it's the first single from the project. It will be out on May 17th. I haven't heard it yet, but I am very excited. The official soundtrack will also be available on June 8th. You can pre-order the Eclipse soundtrack here.
LOVE Muse! Would love to hear more too... *chagrin*