By popular demand here’s a list of sites with old pictures of Detroit (and some other places too)
HistoricDetroit.org is Detroit’s place to learn the stories behind the city’s historic places and for photographers, historians and others to share their love, images, memories and more about its landmarks. You can also find them on Facebook at facebook.com/HistoricDetroit
Detroiturbex.com the point of this site is to raise awareness of the social and economic challenges the city of Detroit faces through photography. You can also find them on Facebook at http://www.facebook.com/pages/Detroiturbexcom/109210839112636. Facebook photos at http://www.facebook.com/pages/Detroiturbexcom/109210839112636?sk=photos.
Forgotten Detroit. Histories and photo essays of many of Detroit’s abandoned or demolished landmarks. You can also find them on Facebook at http://www.facebook.com/pages/Forgotten-Detroit/121468454578957 Go to their links page for a lot of other sites with even more photos.
Detroit Pictures is a small site but it has a Hamtramck section.
Shorpy Historical Photo Archive History in HD is a vintage photo blog featuring thousands of high-definition images from the 1850s to 1950s. Lots of black-and-white historical streetscape and skyline photographs of major American cities from the 1900s, 1910s, 1920s and 1930s are on their Cities page. You can find the Detroit pictures here. Right now there is about 180 pictures in there. You can find more picture by searching like this for Detroit + Michigan.
A great documentary of Detroit at www.palladiumboots.com/exploration/detroit.
Yves Marchand & Romain Meffre Photography – The Ruins of Detroit. Press the < & > keys to scroll through the pictures.
picturesofdetroit.blogspot.com/. Their photo sets.
New York City Municipal Archives Online Gallery has a new gallery of over 870,000 pictures. For a peak at a few of the pictures take a look at this article.
And you can always search Google for old pictures of Detroit.
If I find any more good sites I’ll add them to this post.
Update 4-2-13: Through a generous donation from DTE, Wayne State is able to provide researchers with access to digitized copies of aerial photos of Detroit and area for the period 1949 to 1997. The collection consists of a series of low resoloution (72 dpi) and high resolution (600 dpi) pdf files. http://www.clas.wayne.edu/photos/ap_index.htm