In my albeit biased and small sample of people who are deeply concerned and involved in national community service with AmeriCorps, the phrase "Freedom Corps" is a jingoistic joke: Like Freedom Fries or Freedom Toast. I'm not even exactly sure what Freedom Corps has uniquely accomplished. Well, they do have a spiffy website with a George W. Bush photo-op and a half-sensical Dubya quote on every page. There's even USA Freedom Corps for Kids.
It's also interesting to note that AmeriCorps very nearly lost a huge chunk of its existing funding in the year following President Bush's "Let's Roll," speech. Jus' Sayin'.
Nevertheless, volunteering one or more years of one's life is an awesome and life changing thing to do at any age, and it would be a shame for the message to be lost because of the messenger.