Adele tweeted a photo which suggests she'll be doing the new Skyfall theme song, then this audio clip started making the rounds. This seems like the best idea possible.
Nice nails, BTW
FYI: "A. Adkins" is for Adele Adkins (I didn't know her last name either); Paul Epworth produced "Rolling in the Deep".
Source: @OfficialAdele
"Skyfall" trailer
Update: Adele confirmed in a statement that the track is complete, and it will be released this Friday.