The developers at AGRC have released three new web services for public consumption.
Feature Attributes
This web service allows you to query any layer in the SGID and get feature attributes returned.
Feature Geometry
This webservice allows you to query any layer in the SGID and get the features envelope returned. If your search returns multiple geometries they are all returned in an array of Envelope objects.
Raster Values
This web service direct connects to the SGID database and fetches a raster dataset that you supply by name. It then does an Identify operation and returns the value at the coordinates that you input as a parameter.