http://fiftiesweb.com/burma.htm

l saw these on display at The House on The Rock in Wisconsin, but have not seen any in real life. Does anyone know if they're still around anywhere?

Yes.

When you would drive across North Dakota in the 1950 is and 60's, there would be 10 billboards spaced about 500 yards apart telling how great Burma-Shave was. They were spaced perfectly to read while going 60 mph. Since the company went out of business 30 years ago, the signs are gone. Wind and weather have erased them..