"Old Photo Addicts" should avoid Shorpy (
http://shorpy.com) at all costs. A visit there could send your simple, manageable addiction into overdose.
I'm afraid that I'm a hopeless case as I visit the site at least one a day...
Shorpy's main blog is mostly historical images and there is a Member's Blog section that is dominantly old family images. Which reminds me ... I haven't visited the site in the last few hours ...