Introduction to Statistical Thinking (With R, Without Calculus)
http://pluto.huji.ac.il/~msby/StatThink/
Try R code school
http://tryr.codeschool.com/
Interactive R educaitonal packaage
http://swirlstats.com/students.html
Advanced R programming
http://adv-r.had.co.nz/
https://github.com/hadley/adv-r
language quirks
https://github.com/tdsmith/aRrgh
[ 1h tutorial ] http://alyssafrazee.com/introducing-R.html
[ video intro ] http://medianetwork.oracle.com/video/player/2623621262001
http://www.theswarmlab.com/r-vs-python-round-1/
[ super hero themed tutorial ]
http://cierareports.org/blog/2013/10/18/rCourse2013/index.html
[ One page R ] http://onepager.togaware.com/