Need a good starting point when developing APIs? We like this Wikipedia article on REST based web services. You may also like this Particle tree article on subject, too (via TRYNT).

Since the Vidar team has decided to bring online two APIs for public consumption we have a new found respect for the Yahoo Developer, Alexa Web Developer and TRYNT development teams for creating robust public web services.

We plan on launching:

• A US Geocoder
• Lon/Lat to Lon/Lat Distance Calculator

Both of these functions mesh nicely with the Vidar business strategy.

Now here is an interesting web service, USPS Address Standardization, from TRYNT Technologies. (The TRYNT guys are something else - very prolific to say the least)