Someone actually posed the "Why don't the eagles drop the Ring into Mount Doom?" question to me, and I actually went "hm.... that might have worked..." but then decided the slow way is far more fun for us to read about, and the eagles probably wouldn't have done it anyway. As someone stated earlier, they are their own noble race and aren't at anyone else's beck and call.
Morsul, I know exactly how you feel. In my circle of friends I probably know the most about LotR, but here there are so many people who know so much more. Someday, I too shall be this knowledgable... I hope