Which library i must start to use xbee? (Cerbuino board)

Hi,

I am new with xbee(serie2) an d I would liek to know which is the best library to start use xbee? (Cerbuino board).

point-to-point and point-to-multipoint communications

Thanks in advance,

Hiya have a look here http://xbee.codeplex.com/