Huge fan of the series, I used to reread every book prior to the new one getting released, but it's become such a huge undertaking that I've given up on that process and I usually just read the book prior to the new release.
This time around I didn't even get to do that thanks to Brent Weeks and Brandon Sanderson (Same guy finishing up WoT) having new releases, both of which kick major ass if you're into fantasy.
Anywhoo, for those interested in Towers of Midnight, the next book, it comes out in six weeks and here's a preview chapter:
http://www.brandonsanderson.com/library/65/Towers-of-Midnight-Chapter-Eight
I believe the prologue is available for purchase on E-Readers currently, you have to be pretty darned hardcore to be unable to wait for the whole book, in my opinion anyway.
Tor's supposed to be putting a couple of chapters up on their site here shortly as well.
Can't wait to get my hands on this one though since it looks to focus allot more on Mat, my favorite character.