Webglimmer has launched its tried and true Location Lookup Service. What does this service do you ask? Put simply, it allows the lookup of relational postal information through a standard SOAP Web Service interface.
The benefits of using such a service during development are numerous, but for starters:
Currently, Webglimmer is offering free 30-day license keys at this link. You can also view some demos here.
Keys are available in limited quantity. Claim your free 30 day key here.