I have love for Druids too, on another server, we had a Druid as our main tank for 20 mans. Simply did awesome, and for awhile no tank could do better. (I will add we have population issues since it was an insta-60 server.)
Our bear tank did an awesome job, but like all bears, they always wanted to do other things and eventually went boomkin. The advantages of druid roles are amazing. they can tank, heals, melee & Caster Dps.
PS- thanks for the support theo, get to 60, I'm still waiting for the guide