If you enjoy creating fun, interactive maps, you'll get lost in the latest functionality from UMapper (our UMapper mashup profile). With it, you can include any image--even one that isn't a map--in its Flash viewer.
When looking for a place to live, the surrounding area matters. Knowing if the property has easy walking access to shops, places of interest or public transport can definitely sway a buyer's purchasing decisions. Walk Score is a service that measures walkability within specific locations and also provides neighbourhood maps to the real estate industry. Walk Score's Travel Time API makes this functionality available to be easily integrated with other applications.
The latest release of desktop Twitter app TweetDeck launched with a ton of new features, which includes showing geolocated tweets. If a tweet includes the location meta-data, TweetDeck shows a tiny marker icon. Click the icon and you get a map of the location.