Hi,
Mapserver is a very good openSource software and there is no problem to use it with postgis and OSM. You can use it as OGC Server and Client (WMS, WFS) too. For example please check the example on this site:
http://www.mapserver.org/
http://osmwms.itc-halle.de/
Where can I find / download symbols as bitmap (i.e. .png) for all points of interest with a list for the entries in the column amenity in table planet_osm_point?
Thank you
Sven