Welcome to Smogon! Take a moment to read the Introduction to Smogon for a run-down on everything Smogon, and make sure you take some time to read the global rules.
Garchomp and the un-Uberfied Deoxys-E are dominating standard. So much so that they're probably going to be banned. Stealth Rock is worth sacrificing a pokemon to set up, apparently, but for some reason isn't getting considered for a ban. Hail teams are out of fashion, and even Sand Stream teams seem somewhat rare. Sweeping is the name of the metagame it seems, and those who can't keep up are used as cannon fodder to set up rocks.