Break Reminder, the art..errr app formerly known as Harmony, has been updated in App Store. The new version brings improved support for Lion, so give it a try if you’re running the latest OS X version!
With the name change now being complete it seems like some users are having problems downloading the update. That can be solved by removing the old version of the app (in the Applications folder), and then going to the Purchased tab in App Store to re-download.
You can read more about Break Reminder on its product page and get it in the app store.
Enjoy!