So I went with 5 Druids.

[DarkslayrX]

Do the boomkins generate too much threat?

That is a legit concern - they just seem to piss everything off rather quickly (and probably the reason for the whole panzerkin concept). Spamming wrath and starfire might not be the best strategy. But like most groups, the tank / boxer will have to keep an eye on the threat meter and adjust accordingly.

I was in kara last night with my fire mage and had to back down on my casting (actually stop at times) because I was generating too much threat compared to the druid feral tank and prot warrior.

I am looking forward to mixing my boomkin (42) into my group when they catch up.

[Valorin]

I've got my druid team to 5 now, they are a sliver from 55 and I've worked my 70 in as main. He has mostly feral gear in the bank and I had planned on a 1 bear, 1 tree, 3 chicken setup, but now I'm rethinking it. The main is currently spec'd at balance as a rotation in my guild's instances and I like the synergy that he generates with the others.

So I was thinking this: main has tanking gear and chicken form = panzerkin. The others are balance but no chicken form. Instead of a dedicated healer, they throw heals x4. I was even thinking (at my current low level) of lowering the ranks for mana efficiency. Also, for talents, I was rethinking that and considering putting some points in the threat reduction in Resto to ensure threat for the main. It's an all boomkin team with only one chicken (since the aura doesn't stack). As long as the followers don't pull aggro I should be fine.

Right now, they don't, but they're up against a 70 with some instance gear. I'll keep you posted as I start BC.