Aside from Angry Birds, I can only think of one other game that is as much fun (see: addictive) and that game is Doodle Jump. If you've been waiting for Doodle Jump to go on sale before you took the plunge in purchasing it, you'll be pleased to know that from now until November 17th it's available for only $.99 cents.
In addition to the sale, a total of four new themes (Jungle, Space, Night and Christmas) have been added. Most importantly, bug fixes to improve performance and correct a missing platforms bug have also been addressed. You'll find the download link after the break. Thanks Cameron!