The fact that there is now a video for Not Alone first made me think it might be a single, but here is a picture that caught my eye (note the LP symbol as well as "download to donate" replaced with "Not Alone"):
http://ih.constantcontact.com/fs030/1102926160779/img/15.jpg
LINKIN PARK RELEASE VIDEO FOR "NOT ALONE" FROM "DOWNLOAD TO DONATE FOR HAITI" COMPILATION
Linkin Park has released a special video for "Not Alone," the song they wrote and recorded specifically for DOWNLOAD TO DONATE FOR HAITI, a star-studded recovery effort launched to aid the nation of Haiti following the magnitude-7.0 earthquake that struck Port-au-Prince on January 12th. The video features studio performance footage interspersed with stark images of the Haitian devastation. Check out the video at http://music.myspace.com.
This came from an email message from the Music For Relief mailing list. So what do you think? Just a promotional picture, or a cover for an upcoming Not Alone single?