Launch, MECO, stage sep, second stage is running now.

Update: Second stage engine cutoff (SECO), now coasting until second stage reignition.

Update 2: Second stage reignition should occur at 3:08pm PST (about 6 minutes from now) and burn for about 1min 11 seconds.

Update 3: "second stage restart burn successful. Orbit looks nominal" - @SpaceX

Update 4: "Spacecraft separation confirmed! SES-8 is now in its targeted GEO transfer orbit." - @SpaceX