I started running about 3 years ago and I love it! The beauty is you can do it as much or as little as you want, by yourself or with other people, to celebrate a great day or to blow off steam after a terrible one, and for very little money (a good pair of shoes is the minimum you need).

Check in your area for local running stores or running clubs. Road Runners Club of America is a good place to start:
http://www.rrca.org/find-a-running-club/

And if you're saying, "I couldn't run half a block if there was a bus bearing down on me," just google "couch to 5K" and you'll get a gazillion beginning runner training programs.

I've done 7 or 8 half marathons and am training for my first full marathon this December.

Yes, I'm trying to recruit you, I admit it.