For Finnish developer Rovio, there’s no slowing down, their Angry Birds franchise just keeps chugging along.

According to the latest official data released this morning, the Angry Birds games have just passed a whopping one billion cumulative downloads across all platforms.

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The number includes both free and paid downloads and is an astounding milestone for the popular franchise that debuted on the App Store in December of 2009…

According to a blog post, fans should“keep their eyes peeled”for what’s coming up next from Rovio.

Here, more stats:

• 400 billion birds launched• 266 combined game levels played• 300 million minutes of game play per day• 44 billion collected stars• 200,000 years of combined game play

The company’s latest earnings report has revealed thatAngry Birds games generated 648 million downloadsby the end of 2011.

The series now has more than 200 million active users monthly and helped Rovio book a cool $106.3 million in 2011 revenue.

Here’s a nice little clip accompanying the announcement.

[tube]R7HcBPtWh6o[/tube]

According to some, the short clip could indicate that Rovio might have acquired rights toCasey’s Contraptions, which would be pretty huge.

Espoo, Finland-headquartered Rovio files as one of the most profitable game developers out there because its business encompasses games, advertising and merchandising.

The word on the street is that Rovio will go with an IPO some time in 2013.

Anders Lindeberg, Rovio’s head of investor relations, toldReutersthat“this company is preparing itself and getting ready”.

According toAllThingsD, Rovio hasn’t decided yet if – or when, for that matter – they will file for an IPO.

The company also hinted that“something big is coming”following the release of Angry Birds Space, the latest installment in the series.

In the 35 days since theMarch 22 launch, Angry Birds Space hit50 million downloadon all platforms.

Man, one billion downloads, that’s a hell of a milestone, no?