Thanks to Brian, here is a picture of the AllSpark fragment and prop container as seen in one of the movie stills (below) from USA Today last year. The photo was taken at the LG Booth as part of the promotion between LG and Transformers. Exactly what part the fragment plays in the movie has yet to be revealed.
Update: Via TFW2005, below is the picture of the LG Versa Limited Edition Transformers 2 cell phone. I have no idea what the availability plan or cost of these phones will be.