Armstrong has confirmed in an interview with Vanity Fair that he will ride in Le Tour next year. It was originally reported he would ride with Astana, now directed by Johan Bruyneel (he was director of the U.S. Postal and Discovery teams for all 7 of Lance’s victories.) This has since been denied by Astana. It is not yet known who he will ride for.
Edit: Sorry I didn’t put up a link. I’m on an iPhone and haven’t quite figured out how to cut and paste yet (or if you even can on one of these things.) Just Google “Lance Armstrong” and “Vanity Fair” and I’m sure it will come up.