I read at Tor publishing yesterday that there will be one more book after this one coming out. They also have the cover art shown for Knife of Dreams. the address is
http://www.tor.com/jordan/medai.html I think that if Cadsuane is going to teach Rand to laugh and cry again and Alivia is going to help him die, then it will actually be Lews Therin that finally dies at Tarmon Gai'don. I got to read some of the chapter titles from Knife of Dreams that were released. And just to speculate, I think that Moiraine is going to reappear (being released from the Aelfinn and Eelfinn).