Hi,
Are you sure the last link is what you wanted us to look at? Can you double check.
Can you elaborate on what you mean by "2d sprite animation". It could be many various solutions.
As Alex mentioned, mecanim is totally the way to go in 99% of the cases. I strongly advice you do so too. If you are indeed using Mecanim then you will need
this package to control your mecanim graphs with PlayMaker:
However, I just released a "PlaySpritesAnimation" action on the
Ecosystem, where you define your sprites, and the framerate, and the looping behavior and it will play these sprites, and send an event when animation is done if loop is not infinite.
Bye,
Jean
[EDIT (Alex Chouls): The action is also available to download below. NOTE: You must login to the forum to see download links.]