Home Depot just called the Autism United office and said they are pulling their ads from the Michael Savage program.
Keep up the phone calls and the emails. Hopefully there will be more to follow.
UPDATE: Clarification from Home Depot Communications:
"To clarify, I work at The Home Depot and can confirm that we do not currently advertise on The Michael Savage Show, nor do we have any kind of sponsorship in place with the program. We support many AM radio stations and weekend home improvement programs that run on these stations. Sometimes an ad will run in error during other programming, or our logo will appear on the station Web site, which we suspect may be the case here.
Sarah, Home Depot Communications "