I suppose you know that you split the layout of ST just like you can split the pane in iTerm2 ... You can even have the same file open twice in a side by side view.
I've watched the first three lessons and looks promising, but if you don't already Objective-C it will became quickly problematic to follow the course.
Ruby alternative - RubyMotion
C# alternative - MonoTouch
That being said, I still think Objective-C is the way to go if you are an individual developer. For a company with a large .NET base of coders for e.g. makes more sense to use MonoTouch.
I've seen the Objective-C book from The Big Nerd Ranch and 50% of the book is about basic C. This is not appealing to me, obviously if you know nothing about C (or you have limited experience) this could be a good match for you.