You already knew this, but I just found out.
The Hydrox is no more.
Check out this article: The Hydrox Cookie Is Dead in the Wall Street Journal. I always preferred the Hydrox over an Oreo. They seemed crisper, and more chocolaty. "Hydrox eaters tend to be independent-thinkers, favor underdogs and be skeptical of corporate marketing" says the article. Yep, that me! Pretty much.
I guess they have been gone since 1999, renamed Droxies, then in 2003 Kellog stopped making them. I stopped eating cookies, pretty much, around then, because of my pre-Sugar Sickness.
I'm always the last to know.