Though Delonte West made it clear to his associates, as well as his former team, that his first choice was the Celtics, the guard is no longer waiting for a call. According to a source close to West, he left for Dallas last night with the expectation of signing a one-year contract with the Mavericks today. "He's happy he's able to play basketball, and he'll be signing with Dallas," said the source, who added that the Mavericks called West to express interest approximately five days ago.