Maybe enable access to blockchain.info, mtgox, coinbase, Inputs, et al for those users who don't run full Bitcoin nodes.
Yes, this is part of what I forwarded to OP, the possibility of accessing your "hosted wallet". However there is also the security element to this, since the operator of a "BitcoinWifi" access point could be shady. So there might need to be some way of knowing you connected to a authentic non modified "BitcoinWifi" spot.
I am thinking checksum md5 on a locked firmware, or something. Very exciting project though.
In the case of blockchain.info, even the hotspot operator can't steal your coins. Also, I think https (hardened against BREACH) should be sufficient, yes?