Along with the announcement of Linkin Park's world premiere concert is official confirmation of some of the bands joining the group on the Transformers: Dark of the Moon The Album. Not really sure why but the track list is one of the more (oddly) kept secrets around the movie. I can see why the Score doesn't reveal its list as the titles tend to reveal spoilers but a soundtrack rarely has that problem.
In a post on their official website, the Goo Goo Dolls announced, "There is a new Goo Goo Dolls song, "All That You Are" featured on the Transformers 3 soundtrack." The Goo Goo Dolls previously provided a track for the first Transformers movie with "Before It's Too Late."
Mastodon's Facebook page added to the track news by posting, "Mastodon will be on the upcoming Transformers: Dark Of The Moon soundtrack, coming June 14th. They will have their cover of ZZ Top's classic "Just Got Paid" featured, alongside cuts from Linkin Park, My Chemical Romance, Black Veil Brides and more."
Art of Dying also joined the chorus on their FB page with post "Art Of Dying's "Get Thru This" from their new album Vices and Virtues will be featured on the new Transformers: Dark Of The Moon Soundtrack, coming 6/14. ...The album also features songs from Linkin Park, Staind, My Chemical Romance, Skillet, Theory of a Deadman and more!" With these three pieces of news we know have an idea of about 9 bands that are on the soundtrack. (links via TFW2005, thanks to Sahara for info)
To summarize the available track info for DOTM: The Album
Linkin Park - Iridiscent (movie remix)
Goo Goo Dolls - All That You Are
Mastodon - Just Got Paid
My Chemical Romance - ?
Black Veil Brides - ?
Art of Dying - Get Thru This
Staind - ?
Skillet - ?
Theory of a Deadman - ?