Happy Wobbs is finally uber, hopefully Deoxys will be next. Anyway. Glad to see Roserade and Spiritomb back in OU. Not a huge surprise. I'm willing to bet Roserade is almost always used as a lead w/ Focus Sash and Toxic Spikes. Spiritomb is probably a response to Deoxys increased usage. Plus, if Dusknoir is OU certainly Spiritomb should be since I believe he outclasses him entirely, maybe people are starting to realize this.
Any surprises? I'm a little surprised by Ninjask actually, not that he is a good Pokemon but I always figured there would be those people who just couldn't resist the SD+Speed Boost pass. It's where it belongs really. Abomasnow usage has been down. I'm not sure why but Hail teams generally (note the use of the term generally for those who might be offended) Hail teams don't work that well in this metagame with Stealth Rock (despite all Hail teams carrying a Rapid Spinner) and hyper-offense (particularly Heatran). In the case of Kingdra, with auto-weather inducers it can be hard to find time to set up a Rain Dance. That's probably why Kingdra has declined. Donphan is absolutely no surprise. I see very few rapid spinners anymore let alone Donphan. He's just not good enough any more. I'm a little surprised about P-Z dropping down. Maybe it's this metagame's centralization towards physical attackers? I also think that primarily special attackers are now using a lot of mixed sets just to beat Blissey (e.g. Azelf and Gengar with Explosion) and Porygon-Z, while he can, doesn't run a mixed set as effectively as some. Actually, if Blissey's usage continues to decline Porygon-Z might see rise later on.