Good advice so far guys, and the tank is looking great. Your cleaner crew will take care of little clumps of algae like that when you add them.
Good advice about leaving the lights out during the cycle.
Not scrubbing also preserved whatever animals and plants were living on the exterior of the rock. Before the after-cycle water change however, I would recommend blowing off your rocks with a powerhead or the such to dislodge any dead material left over from LR dieoff.
Everything looks great so far, nice LR...get yourself a test kit and start watching for all nitrate. When you get to that point, do a nice h2o change, and start stocking.