alright, i've only taken the time to read the first 10 of this thread so far, but i decided i would share what i've learned and take the punishment if i happen to repeat stuff.
first off i'm going to gloat. as far as i know i was the first one on this forum to suggest that Vin's earring was a hemalurgic spike.
http://www.timewastersguide.com/forum/index.php?topic=5697.0 there is my evidence.
second i have to say that Hero of Ages was completely awesome. it was incredibly complex and fulfilling, and even though i saw some elements coming there were still enough moments of sheer awesomeness that i'm still very happy about it.
third. this last wednesday i was able to attend the signing in huntington beach and was able to gather some interesting pieces of information from brandon. he revealed that the names of Preservation and Ruin were Ati and Leras and hinted that they were once just people who came to hold and were transformed by the respective powers. From their names we get the names of the two godly metals: ATIum and LERASium (the metal elend ate).
He also at one point made a comment something like "i've had many people tell me that i need to write a sequel to elantris, and then i hear this voice in my head saying 'maybe i already have...'" i'll let u speculate on that, cuz i really don't know what that means.
I got a chance to talk a little about Hoid with him as well, and we started talking about all the places he shows up, and then i said "yeah, but then he died in the beginning of Liar of Partinel" to which he replied "well at least someone they called Hoid died..." from that i kinda thought that maybe Hoid is a title rather than an actual name and that there are many Hoid's spread out across the cosmos performing some incredible duty...
he also mention the future book The Silence Divine and gave us a short explanation. Apparently in this story the magic system is based on diseases. what that means is that when you get sick the virus also imparts a special power, having evolved to do this in order to stay alive. the example brandon gave was that u catch a cold and then have the ability to fly for that time. the books working title comes from the highest class in this society in which a disease has made its people go deaf, but grants them some great power. i think this a very interesting concept as you could randomly gain and lose powers at anytime and in order to gain a power your body is weekend and your life essentially put at risk.