Angry Birds lands on Windows Phone 7, ready to explore the third ecosystem

Nowadays, you can't really claim to have a mobile OS worthy of the title if your users can't run Angry Birds on it. Good news from Microsoft, then, as Windows Phone 7 can finally be admitted at the grown-up table now that it has released its port of Rovio's epic bird-launching experience. $2.99 is the Marketplace price for the full version, though there's also the option to try out the first few levels for free. Because, you know, there might still be people out there who haven't yet been exposed to the charms of this perniciously addictive little game.