Everbank isn't USAA (my fav) by any stretch of the imagination, but once you're setup properly, they do what they say they'll do. I'm saving in a Yield Pledge MMA each week. At the moment, interest rates are pretty low, but they'll improve once the Fed starts to address inflation.
Discover Bank has a higher yield at present, but not a significant difference to make me shift my money over at this time.
I've had this account since early 2008 and haven't had any issues. Their web site continues to improve.