Landis and Leipheimer are both Americans that could do well in the future. Rumor has it that Levi is looking to swich back to Postal/Discovery. With the right coaching and DS leadership, I think he could come back to his Vuelta form.
It would be cool if Hamilton came back to Postal/Discovery, too.
Personally, I am looking forward to the possibility of Armstrong going up against Simoni in Italy...we might never hear from Gilberto again.