[GENERAL] db replication

hi.. i developing an aplication with a postgresql+postgis... i need to replicate the database to various pda, as well as insure the synchronization between all repliques... can someone with experience tell me what is the best free solution to my problem?... thanks... andy...

[GENERAL] cant get spatial data..

try { Object fs = this.resource.resolve(FeatureSource.class, new GeoProgressMonitor(new NullProgressMonitor())); if ((fs != null) && (fs instanceof FeatureSource)) { FeatureCollection fc = ((FeatureSource) fs).getFeatures();