To my knowledge, No. Seeing as LittleBigPlanet 2 is coming out in little more then a week, and that most company's don't create version 3 before version 1 or 2. I hope this helps :)
It took about you could say 3 to 4 years.
No.
No there is not.
No, LittleBigPlanet 2 is only available on PlayStation 3.
No not yet
Currently no, LittleBigPlanet 2 will only be released for the PlayStation 3.
4
About 4 years old
LittleBigPlanet 2 just came out on January 2011 and there are no announcements on a third in the series
4
There will be no LBP3 in any country. There are newer LittleBigPlanet games like LittleBigPlanet Karting, but the title is not LBP 3
Playstation 3 and the Psp