Oh yes, I've read everything by Tad Williams. You can find a rather unorganized post on the otherland thread about that work.
I enjoyed Shadowmarch, it was slow to start to pull you in, but pull you in it does.
Memory, Sorrow, and Thorn are of course wonderful and probably the best "epic" fantasy I have read. I like G.R.R.M. better, but his work can't be described by just one genre. Williams pretty much epitomizes epic fantasy in MST though.
Thanks
