Here's the thing, mikeishere--You're going to have a fabulous time!!! Doing whatever you want, when you want, how you want, as much or as little as you want.
You've gotten amazing advice from all the other posters on this thread, so I can only add that sometimes being alone at WDW gives the experience a different sort of excitement than what you're used to having when you're with someone. I've never deliberately done a solo trip, but I've been solo on trips I've taken with DH or my sister--neither of them has the Disney Energy that I've got. I strike out alone, at first feeling sad that my sister of DH isn't with me, and then I have a great time anyway! Calling and texting do help, though. Like you, I like to share the "Wasn't that excellent?" moments with someone else. That's what your phone's for. Use it. And just be gleeful, which you will be.