Since my last post I've finished all of'em, even buying A Feast for Crows in hardback 'cause I couldn't wait for it in paperback. The last one is the weakest in the series, and it still rocked. It sets up the story like the first one, in so far as it stirs the plot slowly, gettin' you ready for the next one--hopefully in 2007!
I can't stress enough to read this series. It's one of the best fantasy series I've read. Period.
Cheers.