Same for me; created the folders, moved the files, still not visible in the ringtone list. Weird part is that I had them at one point, without having done the above, but I can't remember what I did. Just seemed to me like my Droid X was truly an alien; I'd set the ringtones, then unbeknownst to me I'd receive a call and it'd be my fiance's rt while she's sitting right next to me - yes, an odd situation the couple of times that has happened.
I'm having trouble figuring out the Android folder system, coming from a Windows Mobile device - still lots to learn. Back to the topic of this thread, what's missing in the picture?