Would like to emulate google maps' driving directions functionality but use pgRouting instead. google's data over the project area & scale is quite a bit off so we want to use our own transport network data in postGIS.
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For setting up pgrouting and visualising it with Udig [http://www.utdallas.edu/~ama054000/rt_tutorial.html] [Dead Link]
alternative link http://www.davidgis.fr/blog/index.php?q=pgRouting
Make sure your using the right SRID, common ones: 4326 - WGS 84 Long Lat, 4269 - NAD 83 Long Lat, 3395 - WGS 84 World Mercator, 2163 - US National Atlas Equal Area
Here is a good example of pgrouting in action with Open Street Map (Cloudmade 'Web Lite') Data
route: http://www.ridethecity.com/nyc?rid=866162 (icon markers are draggable and re-calculates route)
I've never used pgrouting myself (should have, actually) but http://twitter.com/pgrouting seems to be a good source for latest information about the project and users.