I currently live in Milton.
I'e decided to do a personal project to mark the charity donation bins that I find, as there are none near where I live. There doesn't seem to be any defined way to do this yet, so I'm probably going to develop the idea as I go along. I'd like eventually to perhaps have this information available as an iPhone/other app.
I have a feeling that the best way will be to contact each organisation that I find has a bin to see if they can give me a list of their locations.