Way more useful (for me anyway) is mapping Capslock to ESC. It works with any vi anywhere as long as you are using your main machine to connect. Also with inoremap don't you have to wait for the letter j to show up until you type your next character? That would drive me crazy.
Edit now that I have actually looked at the article: Yes, you can map it to Control but for me it's an awkward place to put a modifier. What if you want to do Ctrl-A? Ctrl-C? At least the way I type, I'm better off using the one in the corner.