JMaps lets you specify an XML file and/or KML file to use for displaying map results. This allows you to create a file and map anything in a module position within Joomla. JMaps also allows you to pull in feeds of data and map the results.
The map to the right is built using a custom XML file with two entries (red markers which are two bars on the West Coast) and an RSS from the U.S. Geological Survey (blue markers) mapping recent Earthquake activity. The original feed can be seen here: http://earthquake.usgs.gov/eqcenter/catalogs/eqs1day-M2.5.xml
RSS, KML, or KMZ feeds can be used for mapping. Feeds can be shown on any map with any other data such as SOBI2 results, custom XML mapping entries, CB entries, etc.
The uses for this kind of mapping are really limitless. Real Estate agents can easily show listed houses. Non-profits can show areas affected by natural disasters. Tourism Companies can show available rental units. Any kind of existing feed or file that you create with valid geocode information can be used to create a map and quickly display it in a Joomla Module position.
In the JMaps documentation, instructions are provided on how to create custom XML files for mapping.
This map also shows the optional Google Search Bar. The Google Search can be hidden or displayed. The Google Search will add one or more markers to the map while continuing to show the SOBI2, Community Builder, custom XML, RSS, or KML feed information that was mapped prior to the search. JMaps can also show a blank Google Map strictly for purposes of showing the Google Search Bar.