Have you always wanted to write your own Yahoo! Mail client? Now you can! Just weeks after the launch of Yahoo! Pipes, Yahoo! launches another big developer product. Mail has opened up their backend, which powers both the Mail beta and the Frontpage module. The service supports SOAP and JSON-RPC, which supports all kinds of languages. On the Developer Network site you can find code samples for Java, .NET, PHP, Perl and Python to get started quickly. Getting the user-credentials is done through BBAuth!
The official announcement can be found on the Developer Network Blog.