Was there yesterday for a couple of dives, vis seemed pretty consistent at about 10-15' on our 1st dive. We stayed on the north end, and the temps held steady between 73-76 F (Road->Trench->Hatchery-Fuel Tank->etc->out @ the road)
I guess I could have just said Counterclockwise around the north end
On the 2nd dive I would say the vis was only slightly better, maybe 15-20 but we didnt get much further south than the Flamingo (West Platform -> Flamingo -> Lark -> missed the truck but found the south end of the Trench->back along the south edge of the roadbed). As for temps, there was a distinct thermo-cline at 33-35 with consistent readings of 61 F below it (down to my max of 40)
I did note signs of a sulfur layer beginning to form at the thermo-cline while diving south of the road (someone told me thats a sign of the algae dying, but I could be mis-informed)