How would you go about making a shared photo stream?

I'd like to make a stream that can be posted to by any of a group of people without it having to be owned by any one of them. Flikr and Tumblr seem to want an owning email address if nothing else. I guess I could create a throw-away address for it, but I'm wondering if there's a better solution that I'm missing...

It's all over, bar the shouting (politics)

Absent some kind of miracle or Mitt being caught in flagrante with a four-legged critter this contest is over.
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