A while ago
Bokeh Effect in Pixelmator
This one is really cool. And you noticed that, too, since I received lots of e-mails asking for that nice picture we use in the Pixelmator 1.3 Tempo screenshot.
The wonderful bokeh picture was created by Fabio Sasso—an image editing magician at Abduzeedo.com. The guy really knows how to push Pixelmator to perform its best.
So instead of giving you a direct download link to an image, I am happy to provide you with the bokeh tutorial by Fabio Sasso so you can make one for yourself.
P.S. According to Dictionary.app, bokeh is the visual quality of the out-of-focus areas of a photographic image, especially as rendered by a particular lens.