I did that for a few years, then stopped cause he was all over the place. And now with Emily, I just don't have time. But that really is a nice site to have. I used to use
www.trackaflight.com also.
It DID freak me out once though, I was tracking him through a big storm and he just fell off the radar. I was panicked for the next hour or two til I got a call from him (after my panicked messages on his VM) LOL!