When will the PS3 sell more software units in NA than the 360?

[Million]

Hmm i'm guessing when the PS3 console base is within 10% or the XBOX 360's install base at least , assuming that Sony actualy start pumping out the 1st party exclusives that all their development studios have been in the caves making and Sony buys some 3rd party exclusives

I'd say Q4 2009.