Elia Network and iPresentee have teamed up for KeynoteStage (http://www.keynotestage.com/), which has been developed to provide Keynote themes for Apples Keynote presentation application.
KeynoteStage contains 145 themes contained in three categories: Keynote Themes, Keynote Themes for iPad and Keynote Motion Themes. Each individual Keynote Theme is priced from US$5.