While not old, vanishing, advertising signs, these signs from a current, ongoing Dewar's whiskey campaign remind us that hand-painted, old style ads can still be produced. I've found three in the Portland area; two downtown and one on SE Hawthorne. All photos taken in 2007.
West Burnside at SW 3rd:
SW 3rd and Ankeny, behind Dante's:
SE 49th and Hawthorne, at Mt. Tabor Legacy:
Thanks to Colossal Media for this video: