A few months ago we already announced that the Yahoo! Blueprint platform is going to extend its device coverage from a few hundred devices to several thousand handsets and phone/browser combinations.

After we made this extended device support available to Yahoo! internal properties in June, it’s now also available to all 3rd party developers using the Yahoo! Blueprint platform to build their mobile web experiences.

This is a huge step for the platform offering, since it makes your mobile sites available to potentially every user, regardless of which phone they are using. A mobile site developed with Blueprint can now be displayed with an wonderfully rich UI not only on iPhones, the Palm Pre, Windows Mobile phones or Series 60 3rd edition phones, but also at the same time – without you having to change any code – on amazingly popular devices (think Blackberry Curve, Nokia N70, Blackberry Pearl, and even the Motorola RAZR V3i) that do not come with highly sophisticated browsers.

Yahoo! Blueprint gives you, the developer looking to build a mobile web experience, an incredibly easy way to reach your users, no matter what device they are using. There are some devices which we do not support, but those are mainly limited to handsets that only support WML pages, can’t handle or support images or have strong memory restrictions.

Visit our Yahoo! Blueprint DevCenter to get the documentation and to learn how to get started: http://mobile.yahoo.com/devcenter

Here are a few examples:

Sony Ericsson W810i Screenshot:

Same page on an iPhone:

Blackberry 8800 Screenshot:

Palm Treo 650 (Palm OS) Screenshot: