Quick question: Has there been any other actual singles released from Planet Earth other than Guitar?

I know SHOE has a video and a few songs have had radio exposure, but have any songs been officially released as either a physically purchasable or digitally down-loadable single anywhere in the world?

Just curious, cheers.

there was a promo single for guitar

The single "Guitar" was released on July 9th, 2007. The cover image can't be found now, Damn! Anyways, the tracklist is:
1)Guitar
2)Somewhere Here on Earth

The "Chelsea Rodgers" & "The 1 U Wanna C" singles were cancelled.

The Verizon ad with the "Guitar" video was released on May 31st, 2007. U can still see it here (U might have 2 click the audio option at the bottom of the player 2 hear the video):
http://estore.vzwshop.com/prince/.
[Edited 3/1/08 21:53pm]