Hey!
So I've been trying to learn how to sing and many people preach the 'miracle of the middle voice'. (Roger Love - "Set Your Voice Free", or Brett Manning's "Singing Success").
Basically what it is, is a mixture of head voice with chest. There is no 'break' when you go from chest to head... You know sometimes when you switch and the note is too high for chest and too low for head? Try to switch back and forth [between head and chest for the same note] and you'll get a yodel kinda sound (eeeks).
Now check this video for an example of middle voice:
http://www.youtube.com/watch?v=IwOgfDFI7PY(mix = middle, belt = chest, legit = head)
From 00:52 you can hear a demonstration where he goes from chest, than in middle. It's smooth and cool
So if any of you know how to do this stuff, I would like to know...