According to this new post on the EngineYard blog, they've decided to become the official sponsor behind the Lithium PHP framework, a project that's been going for several years but just hasn't seen the adoption of other frameworks that are PHP 5.3-centric.

We are proud to announce that Engine Yard is now the first official sponsor of the open source project, the Lithium PHP framework. We believe that Lithium holds a great deal of promise and we want to help it reach its full potential. Therefore, not only are we pledging our financial support, we will be working together to promote the framework to our customers and partners and the community at large through conferences, meetups and webcasts.

The post names some of the core development team (including Garrett Woodworth and Nate Abele) and suggests following the Lithium and EngineYard twitter accounts for future details.