Where'd Bush Go?

I've been wondering this for several months now. Hopefully, some of you can help.
I ask this question without delcaring myself for one side or the other, and I ask that you please not use this simple, innocent question of mine to jump up on your political soapbox via my blog. Remember, I can delete any comments that I don't like.

All of that aside, my question is...

Where the heck is George W. Bush?!?! He was president of our country for what seemed like an eternity, then his terms were over and done with and he just up and disappeared! I've heard hide nor hair about him ever since Obama took office. Why is that? Is there some general rule I don't know about where, after a president has served his full 8 years as Leader of the Free World, he's supposed to go into hiding for a particular amount of time? I've seen one of his daughters "reporting" from time to time on the Today show, but it seems that nobody ever even mentions Bush's name (other than in reference to, "the previous administration," etc.).

I'm just curious. Where'd he go and whycome we don't hear about/from him no more?