Has there been a single format through human history that hasn't seen a port of Worms? Probably not, as the iPhone's "Got Worms" box has now been well and truly ticked.
Team17's classic strategy title was released earlier today for the iPhone and iPod Touch. It's only $5, and while we haven't played it yet ourselves to try it out, it's Worms. If it works on a crummy old regular phone, it should work on the iPhone.