I've already got mine on preorder. I figure it's a good way to support Gygax, reward corporate behavior I'd like to see more of... yada yada yada.
I have never played anything earlier that 3.X, but I have these on pre-order as well. Or at least now that I found a FLGS (as opposed to my first attempt, where the answer to "Can I pre-order these books" was "depends on your sex and age") that placed my pre-order I do.