sent in a disappointing rumor saying "Ironically Matt Smith, the youngest Doctor Who ever, apparently wants to retire early. An unconfirmed report suggests Smith would like to try his hand at Hollywood films after the end of his second season as the Doctor. Smith is currently filming this year's Doctor Who Christmas special with Karen Gillan, who plays his companion Amy Pond, and opera star Katherine Jenkins. After the Christmas special he goes straight into production on a new Doctor Who series set to air next year."
I've tremendously enjoyed the Smith/Gillan combo, personally.