Now, I am not saying this to accuse anything. I am only pointing it out cause I think its funny. Almost every review I have read for this Beta mentions the new change that Druids can gain Cleric Element Domains and how it is a new and interesting idea...wellllll....
"An elemental tuner chooses one domain from among the following: Air, Earth, Fire, or Water. Each domain gives the druid access to a domain spell at each spell level he can cast, from 1st on up, as well as a granted power. The tuner also may replace his animal companion with a small elemental of the same type as his domain."
Amethyst, 3.5ED
Just tossing it out there. :)
Druid domains are also in Unearthed Arcana. It's not a new idea (other than swapping out the animal companion for it).
I haven't seen anyone claiming it's new, though.