“Yahoo! Mail and Messenger are available as separate streamlined apps, however they offer common features that will give you a better mobile communications experience that’s easy to use and immediately familiar,” says Yahoo Mail Product Manager Lee Parry. “Both apps let you compose messages with rich text, express yourself through our many Yahoo! emoticons, access Yahoo! Address Book and phone contacts, as well as share photos that you’ve taken on your phone.”

“The Yahoo! Mail and Yahoo! Messenger Android apps offer many of the core features that you find in their PC counterparts,” adds Perry. “In the Yahoo! Mail Android app, you can search for important messages with our Full Search and Smart Folders features and organize messages into the same personal folders you use on the PC. In Messenger you can set your Yahoo! Messenger status message, view the status messages of your buddy list contacts and chat with your MSN/Windows Live Messenger friends.”

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.