Windows Mobile 6.5.3 is one of the shadowy leaked builds that have popped up since Windows Mobile 6.5 devices began arriving in October. Adding support for capacitive touch, multi-touch and a variety of user interface improvements that replace legacy menu and navigation elements, Windows Mobile 6.5.3 is believed to be Microsoft’s attempt to improve on the lackluster 6.5 release while it readies Windows Mobile 7.

Aspen is part of Sony Ericsson’s GreenHeart line of environmentally friendly smartphones, which are built from recycled plastics and use water-based paints. For this reason, the company describes Aspen as a “business phone with a conscience,” although it’s unclear whether the device is actually sentient and able to discern between right and wrong.

For business users, Aspen features a QWERTY keyboard and offers users the ability to “view and edit office files easily and comfortably,” according to Sony Ericsson. Microsoft’s MyPhone service, which remotely wipes data from devices when they’re lost or stolen, is also part of the package.

Windows Mobile 6.5.3 has been hidden under the same shroud of secrecy that has obscured all of Microsoft’s mobile plans in recent months. Microsoft has been dropping hints about upcoming mobile related news at Mobile World Congress later this month and at MIX10 next month, but it’s anyone’s guess as to whether these will involve Windows Mobile 7.

The new Sony Ericsson Vivaz is the second installment in Sony Ericsson’s new lineup of communications entertainment smartphones, a mash-up of its well-known Walkman, Cybershot and messaging concepts. Like its Android sibling, the Xperia X10, the Sony Ericsson Vivaz Symbian smartphone offers a new “human curvature” design philosophy. Sony Ericsson says this will be the way to instantly recognize this type of smartphone in the future, and if you’re looking for an all-in-one smartphone solution tailored to consumers, the Vivaz will be a smartphone to keep an eye on in the months ahead.

Customizable Vivaz UI

When we played with the Sony Ericsson Satio a couple of months ago, its user interface came across as a rich cell phone interface rather than a smartphone interface. With the introduction of the Sony Ericsson Vivaz, however, a new and important tweak has been made: The five “home screen” panels first seen on the Satio have been extended and made more user-configurable on the Vivaz, including the ability to select Flash Lite content such as apps, games and animations.

Sony Ericsson has included Twitter and Facebook apps written using Flash Lite 3.0, and the manufacturer encourages third-party developers to offer Symbian and Flash content through its expanded PlayNow ecosystem, previously only available to music publishers.