- http://www.devdaily.com/unix/edu/ – straight simple, my favorite
- http://www.sm.luth.se/csee/courses/smd/139/smd139_vi.pdf – also very simple, but two pages long
- http://www.kcomputing.com/vi.html – a more graphic layout, can be confusing
- http://ploug.eu.org/doc/l-vi-a4.pdf – a full tutorial so you can make your own cheat sheet
Very handy indeed, especially for recent switchers. Click here or on the image to get it.