My new 10-box group layout.

[Stabface]

Well, I'm about to hit 60 on the toons to fill out my 10-box group (thank you RAF!), I expect hitting L70 will take maybe a month if I push so... as it stands I'm planning to gear up a little bit and hit Kara before WotLK.

I ended up going with 2 paladins, 8 shaman, a druid, and a priest. Yes, that's 12 characters - as I advance in gear and need less offtank/heals then I can swap in more DPS.

1 Protection Paladin (tank)
1 Prot/Holy Paladin (offtank/offheals)
1 Holy priest or 1 resto shaman (main healer)
1 Boomkin, who will also get all feral and healing leather if the resto shaman doesn't need.
7 or 8 Elemental Shaman.

So I have a bit of flexibility there, I can run with 1 to 3 tanks, 1 to 3 healers of various classes, and the rest DPS. I think it should be capable of handling any 10 man, as long as I can control them well enough. It will be an interesting challenge for sure!
Well, I guess if they put in Nature immune mobs then I'll be stuck... just have to level up Warlocks or something I guess!

[Darcla]

only problem I see is the reliance on all casters.

in BC 10 mans this really wasnt a problem, and really in 25 mans its still doable. But I would at least plan on seeing more boss fights in WotLK, where casters are nullified(or really nerfed) and it will rely heavly on melee. I would level up a 3 hunter team just to be safe. Controlling them will be easier than feral, rogues, or warriors.

[Schwarz]

I would also think about having one warlock. Aren't they doing something to the curse's to include nature damage. Also they are nerfing lightning bolts to come with this change. I am seriouslly considering leveling up another 5 druid team. Then also hopefully get a warlock and 3 paladins leveled also.

[Stabface]

I would also think about having one warlock. Aren't they doing something to the curse's to include nature damage. Also they are nerfing lightning bolts to come with this change. I am seriouslly considering leveling up another 5 druid team. Then also hopefully get a warlock and 3 paladins leveled also.

Lightning Bolt's spell damage coefficient has been lowered (supposedly from .79 to .71) so it's a nerf but I believe the new talents will more than make up for it. I mean right now Elemental Shaman DPS isn't exactly blowing other casters out of the water (it's not as good as Enhancement DPS even), so I don't see how they could nerf us overall while boosting the other classes in WotLK, we'd be far behind the other casters and no-one would spec elemental anymore.
And yes, Curse of Elements along with some other abilities will now affect Nature damage as well. I'm not worried about it though as long as Totem of Wrath is going to stack -- I'll quite gladly take +6% damage and +3% crit to all spells no matter who they are cast on or what type, over the Warlock's -resists and +10% to the 5 elements. Yes it would be nice to have both but then suddenly you open yourself up to silliness like "I should have a mage for improved scorch, a shadow priest to help the warlock's damage..." etc. and suddenly you find yourself playing all 10 classes really poorly instead of 2 or 3 classes really well.

Also I had forgotten about Lava Burst so I should be OK even against nature immunes