Well I start with some Inkscape tutorials that I found from youtube and think that might be useful for beginners, who open that drawing program the first time. The diction is a bit bad, but.. It gives the basic knowledge of how to use this program.
Rest of Inkscape tutorials from the same authors can be found from youtube in here.
This another video is not so much useful as tutorial I think, but it's just so cool to see how this guy draws that dragon.