Described as "a delicate game of speed and accuracy," Juggler challenges players to keep several balls afloat at once by tapping the iPhone's screen. It looks pleasantly colorful enough, and really, I've yet to play a bad game that features Scott Joplin's "The Entertainer" as background music.
Juggler's got a decent pedigree backing it up, too. Metacreature Games previously released Bloc, which is notable for being one of the first Xbox Live Community Games to not be completely terrible. It was actually pretty fun, in fact. Good luck with your future iPhone adventures, guys.