Garage Sale Maps/Classifieds
The internet has cut into classified ad revenue at local newspapers.
I think newspapers can still play a role, though. Most cities require permits to be purchased for garage sales. Some cities, like Bryan TX, display garage sale maps, but don’t do a very good job at it.
I think newspapers could mashup garage sale permit locations, and add value by allowing garage sale vendors to purchase additional advertising, upload photos, and list the items they have for sale. This would then support a slick map based web gui.
Additionally, SMS based LBS could allow cell phone users to get a list of nearby garage sales when out shopping.