Now how a bear/moonkin is gonna do that..
http://ptr.wowhead.com/?achievement=2946
The buff is cancelled on shapeshifting.. And that's not the first time blizzard does something like that.. remember http://ptr.wowhead.com/?achievement=252
Well at least you could leech other's kills.. but do you think guilds will let druids stay in *caster* form to tank or dps..
With the change of Tree form resto druids might be able to do it but.. :'(