Came across an interesting discussion on Flickr recently started by John Maloof.
I purchased a giant lot of negatives from a small auction house here in Chicago. It is the work of Vivian Maier, a French born photographer who recently past away in April of 2009 in Chicago, where she resided... have a ton of her work (about 30-40,000 negatives) which ranges in dates from the 1950's-1970's.
John has started posting these photographs to a blog http://vivianmaier.blogspot.com/ and is looking to exhibit the work.
It is well worth the time to go through what has been posted so far and I look forward to seeing more.