Hi Jack, 
 
I haven't ever taught online, but I've toyed with the idea once in a while. Here are some questions that come to mind: 
- Are there any education courses or programs that cover how to teach ESL online, and are these courses worthwhile? 
- Is there any kind of professional association for online educators (ESL-specific or not) with resources for independent teachers? 
- What are all the software options for teaching?  
- What software works best for teaching one-on-one / for teaching groups? 
- How much money would I have to invest in the essentials for setting up, including software and equipment? (a good headset, for example) 
- How do you recruit students? 
I'd be interested to read your book or article once it's available 

 Keep us posted!