San Francisco Openhouses - Looking for an open house to visit this weekend? SFOpenHouseMap (.com) can help. If finds open houses by time, area of San Francisco and price range.
Upcoming.org + Google Maps = JibMap - Here is a mashup that takes RSS feeds from the user driven events site Upcoming.org and combines it with Google Maps.
Buy Virtual Real Estate on Google Maps - Virtual Trespassing(.com) explains itself as a Google Maps based site that will let you: "Rant, Express yourself, Advertise, Link your site or Tie your MySpace account to a location". Your property appears as a mini billboard on the Google Map that is displayed. There is information for the new user here.
Food community gets Google mapped - The food community site Chompster has created a Google Maps mashup that allows users to keep track of their favorite restaurants and discover other users' favorites. Features of the mashup are described on the site's blog.