odd, my yakjuzs nexus came with 4.0.2 and baseband version - I9250XXKK6 out of the box, meaning there is actually an upgrade out there i guess.
IMO 4.0.2 is not worth it, neither is waiting for the official 4.0.3 roll out - you're better off sparing yourself the wait unlocking/rooting then flashing a custom 4.0.3 rom. the difference is so huge that it's embarrassing, frankly speaking
3310 > 3330 > 6100 > k500i > 6630 > 5700XM > N95 8gb > N81 8gb > Samsung i550 > N73 > 5800XM > iPhone 3gs > HTC Desire > Galaxy S > Nexus S > iPhone 4 > Galaxy S II > HTC Sensation + Xperia Play > iPhone 4s + Galaxy Nexus + Galaxy S III > One X > Galaxy Note II + iPhone 5 + Padfone 2 > Xperia Z > HTC One
iPad 2 > Galaxy Tab 10.1 > Galaxy Note > Galaxy Note 10.1 > Padfone 2