We already knew [article id="1638664"]Muse were onboard[/article] for the much-hyped "The Twilight Saga: Eclipse" soundtrack, but on Wednesday (May 12), we learned who else would be joining them ... albeit very slowly.

Yes, the folks over at MySpace Music -- perhaps taking a page out of the [article id="1631616"]Bonnaroo playbook[/article] -- decided to reveal the names of each artist (and song) on the album individually, with a new name being unveiled every 30 minutes. And given that there are 15 spots to be revealed, well, we hope you're not doing anything for the next seven-and-a-half hours.

Anyway, at the time of this writing, seven acts and songs have been revealed, a list that includes Vampire Weekend (who contribute a song called "Jonathan Low"), Beck (who duets with Bat for Lashes on "Let's Get Lost" -- no word from Atlantic Records on whether it's a cover of the Elliott Smith song or of the old jazz standard), the Bravery ("Ours"), the Dead Weather ("Rolling in on a Burning Tree") and Metric, who nabbed the album's opening spot with a track called "Eclipse (All Yours)."

Other confirmed artists and songs are Florence and the Machine ("Heavy in Your Arms"), Akron, Ohio, hammers the Black Keys ("Chop and Change") and London-based pop act Fanfarlo ("Atlas").

The first single off the "Eclipse" soundtrack is Muse's rather excellently titled "Neutron Star Collision (Love Is Forever)," which was revealed on "Twilight" author Stephenie Meyer's official site last week. The single will head to radio on May 17. As previously reported, the [article id="1637325"]"Eclipse" soundtrack is due in stores on June 8[/article], which is probably right around the time MySpace will be finished revealing the last of the artists that will appear on it.

What do you think of the "Eclipse" lineup so far? Is it missing anyone you were hoping for? Sound off in the comments.

Check out everything we've got on "The Twilight Saga: Eclipse."

For young Hollywood news, fashion and "Twilight" updates around the clock, visit HollywoodCrush.MTV.com.