Oh, well, just a few more before getting back to work...
http://www.serebii.net/pokedex-bw/646.shtml660 BST Ice Dragon with Pressure
95 speed. 130 in both attack stats. Tanky. No W4 (in fact, Ice resists Dragon's Fire weakness, and Dragon resists Ice's Fire weakness, so only four W2s). Obviously nice STABs, but they overlap a little. Both Ice and Dragon are stopped by Steel, but Focus Blast exists for that. Nothing hugely outstanding in support moves.
verdict: uber. Less automatic than you'd expect for a 660 BST pokemon, but y'know, 95 speed, 130 attack stat with good STABs would be suspicious on a 600 BST pokemon.
http://www.serebii.net/pokedex-bw/645.shtml600 BST Ground Flying with Sand Strength (or in the Dream World: Encourage)
101 Speed. 125 Attack. 115 Special. Swords Dance. Explosion. Rock Polish.
Sand Strength is 1.5x the power of Rock, Ground, and Steel moves under Sandstorm. So...2.25x STAB Earthquake, and 1.5x Stone Edge. Other random moves include U-Turn, Outrage, Hammer Arm (100 power fighting move, lowers speed). For use with the high special stat there is Earth Power, Psychic, Focus Blast, Grass Knot.
So...it's basically like Garchomp right down to the Ice W4. Somewhat less durable, but with mix/special setups possible. Oh, and bonus Earthquake damage, and Explosion.
verdict: uber.
http://www.serebii.net/pokedex-bw/644.shtml680 BST Electric Dragon with Terra Voltage (which means: can't be stopped by opponent abilities like Volt Absorb).
Oh look, 150 attack stat, excellent durability, 90 speed, and its own unique physical electric moves that are better than all other electric moves. Oh, and Electric is an excellent type defensively too.
verdict: uber
http://www.serebii.net/pokedex-bw/643.shtml680 BST Fire Dragon with Turbo Blaze
Same as above, but replace "physical" with "special" and "electric" with "fire". Just to be cute, if you're playing a Sunny Day team it has Solarbeam! Oh, also note that with Turbo Blaze it can hit every opponent with at least a neutral STAB (as Flash Fire is not an issue).
verdict: uber
http://www.serebii.net/pokedex-bw/642.shtml580 BST Electric Flying with Mischevous Heart (non attacking moves have priority) or (Dream World: Competitive Spirit)
Two obvious comparisons jump to mind: stats are very similar to Azelf. And naturally there is Zapdos being another 580 BST flying electric.
Priority Taunt. Well then. Priority Substitute. I see. Priority Nasty Plot. Well...priority doesn't help here, but like Azelf this is nice. Priority Toxic; not bad. On the other hand, doesn't have Explosion or Stealth Rock unlike Azelf, and doesn't have Roost, unlike Zapdos.
Fantastic lead what with the Priority Taunt. Kinda not the stats you want for Mischevous Heart, though (all speed and attack stats...but when taking advantage of Mischevous Heart speed and attack stats are useless). Most of the Mischevous Heart tricks are dealt with by "attack the ****er, don't mess around" (like priority sub and priority taunt, and...hell, Nasty Plot too). Azelf already proves that glass cannon 580 BST pokemon with Nasty Plot can be dealt with, and Azelf brings more cannon to the table with stuff like Explosion.
verdict: OU, but not uber. Quite highly used in OU as a lead, probably (no Stealth Rocks itself, but can taunt everyone else). Fundamentally can be dealt with, though (hell, Aerodactyl leads are pretty popular, outspeed, and hit super effectively with STAB). Actually, I'm not liking the lack of a priority attacking move, as it does get outsped by Azelf and Aerodactyl, who will both have focus sashes and surely kill in two hits.
NINJA'D
* Taitoro looks in. Meloia/whatever can't start in Step form, has to transform in battle by using an attack (Ancient Song IIRC) according to the info I've been reading.
Oh, well, that's fairly awkward given how one of them is all special attack and one of them is all physical, and you have to waste a move slot and a turn (on a 75 power Normal special move with 10% chance of adding sleep...raised to 20% by serene grace) to get a transform to the big bad physical sweeper. Probably OU as a whole, then.