I love Sandstorm so much, especially in UU where stupid DrizzleToed isn't raining on my parade (SEE WAT I DID THURR).
Sand Rush Sandslash will be ridiculous in UU once it's released. I've been playing DW UU on the Beta server and he's very similar to Excadrill in the sense that he can easily 6-0 teams if he gets off one Swords Dance which isn't too hard. I lead with Hippo and use Yawn turn one, then set up Rocks while they switch, then Yawn again, etc. Eventually they're gonna let something sleep, and Sandslash comes in, sets up, and sweeps. EQ/Stone Edge/X Scissor is all the coverage he needs really, and the rocks help with a couple KOs on shit like Cofagrigus.
On the topic of things that ARE released though, Stoutland is obviously insane, although has awful 4MSS, Cradily is really good as your Water switch in (Gastrodon brings more unwanted Grass weakness, especially if playing DW and using Sandslash), and Sigilyph is pretty nice also. It's like Reuniculus-lite that can burn shit.
Back on the topic of Stoutland, I never know what to run on it. Return, Fire Fang, and Crunch are pretty standard, but then Pursuit, Wild Charge, and Retaliate are all so good in the last slot. I was running Wild Chanrge for a long time, but I kept hating my life as I lose to Missy if it gets a sub up. So I put in Pursuit for the whole mind game aspect, at which point I started running into tons of shit where I needed Wild Charge. Thoughts on which is better? I'm using Life Orb too, for the record, as CB Stoutland is meh, as shit like Missy and Cobalion sets up on you the second you lock into Return.
I've also been testing Clefable in UU Sand, and it's not half bad. It can Wish pass, it can do cleric duty, and it can annoy with a multitude of status (including burn if you Trick a Flame Orb), and it does it all while not taking any damage from the sand, meaning it can run Leftovers, which is the big selling point over Chansey. Ghosts shit on it since you've probably only got S-Toss to attack with, unless you give up a utility move for a coverage move. I guess Calm Mind + BoltBeam set with Softboiled could work too, but I feel like Clefable could be doing better things.
One last final thought before I shut up, has anyone tried out Shell Smash Omastar as a sand sweeper? This is total theorymon here as I haven't tested it, but it seems like it could be a pretty neat idea.
Omastar @ White Herb
Shell Armor
Modest/Timid
4 HP/252 SpA/252 Spe
-Shell Smash
-Surf/Hydro Pump
-Ice Beam
-Hidden Power Grass
Base 125 defense, and base 70 special defense that gets a 1.5x boost from the sandstorm, and Shell Armor to block critical hits mean Omastar SHOULD find a turn to set up, right? White Herb fixes the defense drop and then you just go to town? Sigilyph also happens to resist/be immune to everything Omastar is weak to except for Electric, which Hippopotas or whatever other Ground types you're packing can handle, as well as Cradily having a resistance.
Maybe a team of something like Hippopotas, Cradily, Sigilyph, Stoutland, Omastar, and some sort of utility Pokémon offering team support in the form of Wish/Heal Bell or Rapid Spin, or something that can set up Spikes/T-Spikes (since Hippo obviously covers the rocks) could be effective.
I wrote a novel here, so hopefully people actually read it and leave some feedback. Cheers! =P