A few days ago GISBlog.net mentioned GeoMinder a phone-based software that makes happen what I think is one of the holy grails of LBS, the ability to create location based notes. While GeoMinder seems to be for individual notes, the logical next step is to host these on a server and share them with contacts. Check it out if you have a supported phone (I don’t )

gisblog.net » Geominder