I have this Wi-Drive (see it at http://www.kingston.com/us/usb/wireless/#wid ) and right there is a "share photos with friends."
You could also get your WiFi hotspot to share some drive space for those phones to send to.
Bluetooth is protected with an Apple security thing. There are ways to fix that but I found those I talked to about it had this dazed look as we went over the solution. I'm not doing that again.
I own a photo printing shop and one of the challenges I face daily is getting photos from a customers iphone to print. The only way I know of is to get them to email them to me, which works but it is quite time consuming as they can only send one photo at a time, as far as I know. Other phones aren't a problem as they can select multiple photos and Bluetooth them to my pc or mac which is quick and free. What I want to know is, is there a way to wirelessly send multiple photos from an iphone to either my iPad, mac, or pc without my customers having to pay anything or download an app? I don't know much about apple tv, does that have such capabilities? Any advice would be very welcome!!