Strictly speaking, even DEILD is a sub-type of WILD (going directly from a waking state to a dreaming state while remaining conscious). In the broadest sense there is only DILD and WILD, and various techniques for achieving each one. For example, MILD is a technique for achieving DILD, and VILD is a technique for achieving WILD. A proper hierarchy might look something like this:
Code:
Induction Techniques
/ \
/ \
DILD WILD
/ \ | \
/ \ | \
MILD Reality Checks | \
VILD DEILD
|
|
FILD
This isn't complete, but you get the idea.
By the way, I'm glad that time is being taken to organize the tutorials. The old tutorials section looked quite intimidating. If we can make it more accessible, we may not get quite so many people starting threads asking what WILD is, "is this a lucid dream," etc. 
Also, just thinking out loud, but when all is said and done it may be helpful to make a new Lucid Dreaming FAQ and sticky it in the newbie forum. This FAQ would be similar to the thread of the same name in the tutorial archive, but more concise, and in answering the questions it should favor linking the reader to the relevant tutorials (and Dream Views home page articles - let's please not forget those!!) rather than answering it directly in the FAQ.
I'm starting to stray off topic now, but I may PM the dream guide team with some more thoughts. I may even offer to write this FAQ up myself, but on the other hand, I am pretty busy this semester. We'll see
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