For now, though, things are looking great for Rovio. Vesterbacka told Bloomberg that the company is worth "a bit north of" the $1 billion Bloomberg estimates. Besides the aforementioned do-dads, it sells Angry Birds t-shirts, costumes, and even a cookbook. Merchandise reportedly makes up 10% to 20% of revenues. The game is available on all the major mobile platforms, set-top boxes and game consoles. Rovio has begun making inroads to social media, including a Facebook app. There's no question that Angry Birds can be Rovio's Mickey Mouse — the company's central symbol. But if it wants to entrench itself as a permanent entertainment fixture, Rovio will have to bet the company on something more than a single set of characters. Remember the Cabbage Patch Kids?