I found these on Shoryuken.com. This information is useful for new players and I thought it was also useful for me. I'd consider myself just intermediate level at Street Fighter IV, so I found a lot of what was posted to be very useful.
http://the-morning-after-the-night-before.blogspot.com/2009/02/theory-fighter-volume-1.html
http://the-morning-after-the-night-before.blogspot.com/2009/02/theory-fighter-volume-2-bread-and.html
http://the-morning-after-the-night-before.blogspot.com/2009/02/thoery-fighter-volume-3-offense-and.html
http://the-morning-after-the-night-before.blogspot.com/2009/02/theory-fighter-volume-1.html
http://the-morning-after-the-night-before.blogspot.com/2009/02/theory-fighter-volume-2-bread-and.html
http://the-morning-after-the-night-before.blogspot.com/2009/02/thoery-fighter-volume-3-offense-and.html