Speak with Arch Druid Hamuul Runetotem in Thunder Bluff.
Excuse me [class], but I'd like just a moment of your time if possible.
The Cenarion Circle in Thunder Bluff is most interested in seasoned adventurers such as yourself to lend them aid in a vital research project. While I do not know the specifics, I can inform you that none other than Hamuul Runetotem is spearheading this research.
Please - if you are interested, speak with him directly on the Elder Rise within Thunder Bluff proper.