Alright, guys some metagame evaluation!
Thundurus is quite good. I've been running Hammer Arm / Thunderbolt / Hidden Power [Ice] / Thunder Wave. I don't use it as a sweeper, which is how most people use Thundurus. I use it to break open holes for my other sweepers to push through, as well as just clean like a monster late game. Hammer Arm is interesting, but VERY useful. The nicer accuracy than Focus Blast, the ability to, erm, hammer, Blissey for around 60%. It's not weak off of 266 Attack + Life Orb. It also hits Tyranitar just as hard, if not harder, and is just more reliable in general. The speed drop is no issue, since like I said, it's breaking walls, not sweeping. Thunderbolt + HP Ice hits most of the metagame for a 2HKO. Thunder Wave is the crux of the set, since it means that you almost cannot be swept by a setup sweeper (except Excadrill). I swear, sometimes I make a bad prediction and let, say, Volcarona get in a free BD. No problem, just send in Thunderbro and Thunder Wave, and then revenge kill. Thundurus + Jolly Air Balloon Excadrill also means that if both of those are alive, set up sweepers are limited to 1 KO.
Speaking of Excadrill, he's just as good as ever this round. I'm using Rapid Spin Excadrill, QuakeEdge, and X-Scissor. I use it like a Scarf Pokemon, not a sweeper. I can't tell you how useful spin is. I hate having to predict perfectly or carry a Magnezone when the other player has a Skarmory, but RS Drill solves that and is great support for Thundurus (hey that combo again), Volcarona, and really anything -- I hate switching around when SR is down on my side, and RS makes it so much easier. X-Scissor is great, it revenge kills Lati@s and Celebi (CELEBI!). Try using Drill as a Scarfer rather than a sweeper!
Lastly on my list of anti-metagame Pokemon is Celebi. Nasty Plot + 3 attacks is great, Giga Drain does a ton of healing on a lot of things, and HP Fire and Psychic hit everything except...Heatran and Lati@s, both of whom are conveniently beaten by Tyranitar. Or you can use NP + 2 attacks and Recover, with Giga Drain and your choice of coverage move (generally, EP + Psychic could work). It can take Close Combats, Earthquakes, and Scalds like a champ and heal it off with whatever move.
These are some cool things that I've noticed. Anyone care to share their thoughts on the mons that I showed or have any other anti-metagame / prevalent threats?