J.R.
J.,
Good for you for nursing this long! We have practiced Attachment parenting with our 2 year old son and I am starting to think about weaning as well. I would highly recommed the book: The Nursing Mother's Guide to Weaning by Kathleen Huggins and Linda Ziedrich. I have just started to read it. I am sure you know the basics about only dropping one feeding at a time.
We just dropped our morning nursing session (down to naptime and bedtime only now). It was a little tough, but we tried reading books and snuggling while we had a sippy of milk on the couch, but my son wasn't going for it. He loves the movie "Curious George" (and we do very little TV) so for now we let him watch about 10 minutes of it while he has his milk. The first few days daddy sat with him and had a glass of milk too, and we talked a little about how eventually all big boys (like Daddy) drink their milk from a cup...
After about a week instead of asking to nurse he says "milk! George!" when he wakes up...
I say trust your instincts, if you start weaning and you feel it isn't going well, you can always wait a few weeks and try again...
Good Luck!
J. R.