Featuring soft shadows and grey tones, Divine Fiat has released Keynote Air, the latest addition to its line of Keynote theme sets. Keynote Air comes with two themes Lightly Serious and Seriously Light.

The company says its new designs use subtle, understated tones and an "airy Helvetica Neue font" in an effort to convey elegance and sophistication. Each theme comes with a four slides of extras, including custom shadow elements allowing users to create their own master slide layouts. Resizeable media placeholders come predefined in the 1:1, 3:1 and 16:9 aspect ratios. A video tutorial is also included.

Both Keynote Air themes work with Keynote '08 and '09; they are available in a single package for $47 or individually for $26.