I was wondering how long it would be before the likes of this came out. Basically, a Mifi unit from Huawei with no power source of its own.
Exactly the same otherwise, but it needs power from a USB battery pack\Car USB port\USB wall plug etc, through its USB end.
It does not have to be plugged into a PC, self standing, like the powered units.
I can see this having a bit of a following for bodging, to be used in cars, boats.. etc. They're exactly the same size as a regular USB dongle and have an external antenna port. Currently, certain sellers on eBay will ship from Hong Kong for about €45. (smscaster)
I like this for some reason, maybe just the size, it's so dinky..