Some of the popular Twitter applications (Twittelator, TwitPic) let you automatically publish geo location with the status changes. This location information looks like a short link (e.g. via bit.ly service) pointing to the appropriate google map.
And here is a Java (and/or Coldfusion) component lets you deal with such location info - GPS location. Custom JSP taglib lets you decrypt location link and extract coordinates (latitude, longitude) from it, or vice versa – create such a link for the given coordinates.
And here is a real example: Twitter mashup lets you publish some location right from the Google Maps - Twitter location. Just click on the map.
P.S. see also components for URL shortening services.