Personally, I'd like to know about Fiend Folio. I *Believe* it's 3.0, but I've heard otherwise from at least one guy in my group. Naturally, none of us have it. But I might order it via amazon.com, but I want to know first.
WOTC will not produce such a list as it would incline folks to stop buying the older books still out on bookstore shelves. Maybe later when the older copies are all sold off (or mostly sold off). It would not surprise me that big retailers like Amazon or B&N have agreements with WOTC to keep them from disclosing such until certain sales requirements or time requirements have been met.
If you are looking at Monster books at a game store (where you can flip through the books), an easy way to if it is 3.5 or 3.0 is the labels in the stat block. If it says "Space/Reach" or "Base Attack/Grapple" then it is 3.5.
Also, WotC has changed their stat block configuration. They say its for ease of use, but after combing and editing 1000 monsters for Monster Geographica, I'm afraid I've trained myself into a corner.