  We present the first measurement of the cross section and the double
longitudinal spin asymmetry of inclusive pi0 production in polarized p+p
collisions at Sqrt(s) = 200 GeV at mid-rapidity with the STAR detector, using
the barrel electromagnetic calorimeter. The measured cross section is compared
to NLO pQCD calculations and can provide constraints on the pion fragmentation
functions. Fragmentation is studied directly by measuring the momentum fraction
of pi0 in jets, a quantity that is affected by the fragmentation process and
jet reconstruction effects. The double longitudinal spin asymmetry is compared
to NLO pQCD calculations based on different assumptions for the gluon
polarization in the nucleon to provide constraints on delta g/g. At the present
level of statistics the measured asymmetry disfavors a large positive gluon
polarization, but can not yet distinguish between other scenarios.
