Booyah, a Palo Alto, Calif.-based startup developing a “playful life companion” for the Apple iPhone/iPod touch, just scored $4.5 million in Series A financing from the iFund of Kleiner Perkins Caufield & Byers. (Om wrote about KPCB’s $100 million app funding initiative last year.) The funding comes a month after Ngmoco, another iPhone game startup, launched with Kleiner Perkins backing, announced a second funding round of $10 million. No word yet on what exactly Booyah’s product will be, but the announcement hints at an MMO linked to real-world activity. (At any rate, they’re currently taking sign-ups for a private beta test.) Its three founders — CEO Keith Lee, CCO Brian Morrisroe, and CTO Sam Christiansen — are all alum of World of Warcraft creator Blizzard Entertainment, so expect a sleek, broadly appealing product designed with maximum stickiness.