Best online REW tutorial?

[TROYH4]

I'd like to learn more on how to use REW more effectively and understand my around the program so I can really dial in my subs when I get around to it.
Can someone refer me to some really in depth video tutorials on how to use this software/tool??
Thankyou in advance 

[AVSCraig]

I'd be interested in this too. I just picked up a UMIK - 1 microphone.

[David Vaughn]

Here you go: Probably the best tutorial on sub calibration I've read/viewed. Take a lot of notes (I know I did). I actually watched it twice:  

[jkasanic]

Using the tool is the easy part! Interpreting results and making significant improvements is the tricky part. Once you get the basics, I suggest creating a thread where you can get feedback from more experienced users. Flattening response or creating a house curve is fairly straightforward (provided your room and sub locations allows for it) but the biggest improvements are in the time domain (Ringing, reflections etc using waterfalls, ETC).