Hot Rod,
I had one session of acupuncture. The woman who did it works on my gynecologist's infertle patients and they swear up and down that it helps them conceive. She said acupuncture unblocks your chi (life force) faster, but she sells all her patients a CD on chi gong and tells you to do it every day. She said it will also work, just more slowly. She said that Tai Chi is the military form of chi gong--have no idea what she meant by that. So I assume it is basically the same thing, just different moves. The instructor on my chi gong CD was an older woman and I thought it would be easy, but you are using muscles you don't normally use and you get a really good stretching workout and it is supposed to calm you down.
Curtstl7,
I have allergies and her chinese herbs stuffed me up and made me jumpy. Don't let that put you off--you may react great to them. I had the impression that you had to go for a while. I don't think just one session is going to do much except get you started and let you see if you like it and want to continue. I had a cognitive behavioral therapist I was seeing at the time and he said acupuncture helps some people with anxiety, but his opinion was it really depended on how good the acupuncturist was.