One thing you need to investigate is whether the device(s) support ad-hoc networking. Most shields do not, since that takes quite a bit of effort. Connecting a WiFi shield to an existing network is one thing. Creating a network is quite a bit more complicated.
Can this be used?
QuoteCan this be used?I don't know. If you do get one, and it works, be sure to let us know. I'd get one, then, to play with.