The creator behind the immensely popular 'Angry Birds', Rovio Entertainment, are looking to go public in 2013. The company is looking at an initial public offering (IPO) in 2013, in either New York or Hong Kong. What would you think Rovio is worth? Well, analysts pin them being valued at a very respectable $9 billion.

With the popularity seeming to never end with Angry Birds, the IPO should go very well. Angry Birds has smashed over 800 million downloads, and sports 200 million active users monthly, this is by the end of 2011. Angry Birds Space launched to huge numbers, hitting 50 million downloads in 35 days which made it the fastest growing mobile game, ever.

Profit-wise, Rovio made $99 in sales last year, and profits before tax was $48 million. Not bad considering 2010's revenue of around $10 million. Mikael Hed, Rovio CEO has said:

2012 looks fantastic. We have had some very strong download numbers over four months.