PostGIS 2.0 now has full support for raster datasets, and it is possible to import raster datasets using the raster2pgsql command.
In this recipe, you will import a raster file to PostGIS using the raster2pgsql command. This command, included in any PostGIS distribution from version 2.0 onward, is able to generate an SQL dump to be loaded in PostGIS for any GDAL raster-supported format (in the same fashion that the shp2pgsql command does for shapefiles).
After loading the raster to PostGIS, you will inspect it both with SQL commands (analyzing the raster metadata information contained in the database), and with the gdalinfo command-line utility (to understand the way the input raster2pgsql parameters have been reflected in the PostGIS import process).
You will finally open the raster in a desktop GIS and try a basic spatial query, mixing vector and raster tables.