From 9to5toys.com  (Twitter, Feed) today:

2011 Apple Design award winning image editor Pixelmator is only $15 today at the Mac App Store.  That’s half off and the lowest price we’ve ever seen.

Also, if you are going to put Parallels on your new Mac, MacUpdate has a pretty incredible 11 app bundle for $49.99 (Details). You only have a few hours to hit this one before it expires.