Building a web site that works across a wide range of web-enabled devices is no easy task. Responsive web design is a great solution from a design perspective and building a site up, using Progressive Enhancement, from a Mobile First approach lets you layer on features that match the device browsing the site.
Enter Luke W's RESS: Responsive Design + Server Side Components, in which he cannily suggests the pragmatic approach of taking the best of both worlds.
In a nutshell, RESS combines adaptive layouts with server side component (not full page) optimization. So a single set of page templates define an entire Web site for all devices but key components within that site have device-class specific implementations that are rendered server side.
Then Dave Olsen's Detector came on to the scene as a smooth and easy way to start using these ideas: drop the Detector Library into your project and take advantage of its powerful feature-detection. Since I use WordPress for most of my work, I wanted a way to easily add Detector to my projects. I've taken the latest version of Detector and wrapped it up as a WordPress Plugin. Like Detector itself, the Plugin is in beta, so should be used with caution.
The Detector plugin can be downloaded via the Plugins menu of the WordPress dashboard, or from either of the links below.
Download Detector from WordPress.org.
Download or Fork Detector WordPress Plugin on GitHub.