The GOOG released an API for their maps product. People have been kluging together little (although useful!) applications with GOOGMaps since shortly after it came out. This should make it that much easier. the ‘Hoo, it turns out, has also provided an API for its maps product.
Both the GOOG and the ‘Hoo seem to be tripping over themselves to make it easy for their users to build useful things using their services. This is a wonderful turnaround from the bad old days of perl scrapers for every service out there — Net::Yahoo::Scraper::Stock::WorksPoorly::Undocumented and so forth — and companies that didn’t understand the power of opening up their services to an army of creative people. Now all we need is for Mindset to publish a web service.