Google has released version 1.2.5 of the App Engine software developer kit (SDK) for Python and Java. This happens to be the company’s first simultaneous release for both. The API includes XMPP (also referred to as Jabber) support, which is an open standard for instant messaging. This comes in the form of the XMPP API for both SDKs.

“Like the other APIs that App Engine provides for developers, XMPP is built on the same powerful infrastructure that serves other Google products,” says Google on the App Engine Blog. “In this case, we take advantage of the servers that run Google Talk. This new API allows your app to exchange messages with users on any XMPP-based network, including (but not limited to!) Google Talk.”

Developers involved with the preview of Google Wave can also use the API to build bots that interact with waves. Wave will be available to schools and businesses this fall, by the way.

“We’re very proud of our first XMPP release, but there’s still more work to do,” says Google. “In the future we hope to provide even more functionality to apps, such as user status (presence) and info on new subscriptions.”

More information about the API and SDKs can be found in this post. There are links to documentation and release notes available there.

“Start with directed search and streaming and then sit back or multi-task and Listen to content matching your favorite programs and queries like ‘ABC Nightline,’ ‘Bernanke,’ and ‘Fantasy Baseball,’” the company says. “Currently we are indexing audio files from about 3,000 RSS feeds but we plan to index all web audio, talking head videos, and short personalized text-to-speech segments.”

With Google Listen, you can use the search bar from the home screen to search for audio programs, then just press on a result to automatically stat listening. Long-pressing brings up more options.

Users can keep subscriptions, which allow you to keep up to date on specific programs or search terms. Once a search result is pressed, there is a checkbox in the corner that lets you easily subscribe. The app always shows the latest episode on the programs tab of the My Subscriptions screen. Users can subscribe to search terms by selecting the checkbox while viewing the search results. Users also keep a My Listen queue, which lets you chose specific episodes to hear in the order you want.

Google listen can be downloaded here. There is also a FAQ and more information.