Denied's first update is now available. In addition to Spotify, you can now automatically skip tracks in Rdio and iTunes as well! It also features an improved add-rule-flow that lets you create new rules much faster.
Get the update from the Mac App Store.
If you couldn't decide whether to get the full version of Denied, I've just made that decision a lot easier:
Denied is on sale for a limited time for just $2.99, down from $6.99!