This has been blogged ubiquitously today, so much so that the original site exceeded bandwidth. It should be back up soon, but until then there are still pictures around, and more background on the story here. Mental Floss says it best:
Yesterday I came across a slightly mysterious website — a collection of Polaroids, one per day, from March 31, 1979 through October 25, 1997. There’s no author listed, no contact info, and no other indication as to where these came from. So, naturally, I started looking through the photos. I was stunned by what I found.
In 1979 the photos start casually, with pictures of friends, picnics, dinners, and so on.
Sadly, the story ends abruptly. But the Polaroids live on, giving their owner’s life a warm tint as only Polaroids can – a Time-Zero flipbook of a man’s daily life from 1979-1997. It’s such a powerful piece of work to me: the thousands of neatly categorized images, the inherent nostalgia of the Polaroid color palette, the mundane alongside the intimate portraits of happiness and illness, and those who lived on and honored their friend with this exhibit – the story of a life recounted by an SX-70.