Yahoo Maps has fairly recent satellite imagery for Mueller
Yahoo Maps has added satellite imagery much like Google Maps, and it's recent enough to show the reconstruction in progress on the old Mueller airport site. You can see the Dell Children's Hospital and the hole in the ground that will be the lake (click through for notes).
By comparison, the Google Maps imagery predates reconstruction.
Of course, either one could be updated by the time you read this. Here are the latest Yahoo and Google versions of these shots.