Eyefi would work over wireless, assuming it doesn't use a gateway page. If you have a gateway page, then I don't think it'll work. Or they have to be specially provisioned by MAC address/range by your equipment.
About the tracking bracelet/etc. I don't think RFIDs can determine location, just that they're there. More of an authentication thing than a location beacon. But something else might work...tricky stuff.
On bandwidth, not thinking so much about the wireless link as what you'll connect the link to. Do you have fiber to connect your wireless link to? If so, how much does that cost? Just asking the dumb questions here...
Hey Iansltx, Just an update. I was able to stream some video/flash to my little gateway tablet laptop with the standard intel centrino wifi b/g modem. Bit more testing then a beness Model.