The App Design Guides explain how these templates can be used to design and build beautiful and usable apps.

ENGADGET: Touch-based Ubuntu preview coming February 21st, will work on Galaxy Nexus and Nexus 4

Canonical has published a Preview SDK and App Design Guides to allow developers to create applications for the full range of Ubuntu platforms.

ENGADGET: Touch-based Ubuntu preview coming February 21st, will work on Galaxy Nexus and Nexus 4

It is not easy to find critics of the new design - most guides seem to agree with London's Lonely Planet Guide that it has undergone "a remarkable transformation", making it easier to appreciate the buildings flanking it.

BBC: Successful London Olympic bid celebrations