The latest version of Yahoo!'s own mobile platform, Yahoo! Go 3.0 beta, is headed for prime-time tomorrow.

The biggest news in this release is the inclusion of the Mobile Widget Platform, which allows access to third-party widgets on the Yahoo! Go and Yahoo! Mobile pages. Widget makers include such big boys as eBay, MySpace and MTV--and with the release of the SDK to developers in the next few weeks, expect to see an explosion of third-party widgets.

Yahoo! Go will also feature an updated UI, optimized for--you guessed it--the mobile device. The home page is heavily customizable and includes new email at a glance, upcoming appointments on your calendar, weather, news, etc...

Of course this type of feature-rich release is not going to work on that old phone you have sliding around in your glove box. Upon its release, the Yahoo! Go 3.0 beta will be available only on high end mobile browsers such as the Apple iPhone, several Nokia Series 60 devices, including the N95, and select Windows Mobile devices (though it will be available for more devices "soon").

[Via Mashable]