Rovio to announce multi-tiered pricing plan for Angry Birds Android, may include ad-funded version

As all you Android owners must surely know, Angry Birds is finally set to hit the Market on Friday after what must be the most thorough porting process in the history of pocket gaming.

We’ve just received an interesting tip-off: while Rovio is making the game as faithful to the iPhone version as possible, the way it’s going to be sold on the Android Market could be rather different.

It seems there are going to be multiple versions of the game made available. We have one of these final builds in our possession right now, and the big news is that it contains adverts.

Will Android gamers have the option of downloading an entirely ad-funded version of Angry Birds?

We’ll have to wait until the game’s Friday release to find out for sure, when we’re told that Rovio will reveal a “very interesting” pricing system.