USAA is the best bank, period... This is just another brilliant idea that they have put into action. There are so many protections they incorporate into their systems that they are able to do things like this with confidence in their ability to keep things under control. Its no different than their online check scanning system, its just making it easier for their customers. Another feature they put into practice is limiting the amount you can deposit per day... So a $50,000 check isnt going to just magically appear and be deposited into your account, you'll have to send that one in so they can run their security measures and ensure its not a fradulent check and authorized by the issuie.
Also consider the fact that if someone does use this service, or any other service USAA offers, for fraudulant activity... They wont have the opportunity to do it again, and they'll probably be enjoying a nice prison sentence. USAA doesnt take their security lightly, and for a good reason, look at their customers, military members and their families. Its not open to the public like every other bank out there.
I just hope they open this up to WM phones as well...
I think WM phones might get some more attention when WM7 is officially released with their app store though.