Dang, Sorrowsong. You're perceptive. You aren't completely right--in fact, you're way off on some things--but the mere fact that you've noticed a couple of my very early plot threads is impressive.
I'm afraid that several people here are alpha readers of mine--meaning I let them see the books before they're out in print. I'd prefer that specific spoilers on books two and three were not posted on the forum. However, let me say that you've got a keen eye and that you'll want to watch book two very carefully.
Feruchemists cannot pass attributes to other people.
There is a reason why Vin is more powerful than Kelsier.
The earring is important.
These three statements aren't necessarily all related to one another.
If you want more and you can convince someone on the forum to email with you, then go ahead. However, further speculation should remain that--speculation. Those of you who know, please refrain from holding it over people's heads or from giving out spoilers in a public forum.