SOF is available on Nook and Kindle - make sure you never miss an issue of the Journal of Professional Adventurers!
For the Nook, go to: http://www.barnesandnoble.com/c/soldier-of-fortune%2c-inc .
For the SOF Kindle edition, go to: http://www.amazon.com/dp/B006BDWP58 
The magazine is also available on these devices below:
Kindle Touch 
Kindle Fire 
Kindle Keyboard 
Kindle DX 
Kindle for Android