Exactly the thing that I was looking for.

I have been using Wordpress for over 7 years now. I have a blog about Chrome and Chrome OS which is doing good, but wanted to do something around Wordpress. (I did try writing a blog about Firefox, but that did not take off because I do not use Firefox much after switching to Chrome)

And, the blog niche that you suggested, that's the thing that I have in my mind. I have selected a domain name, and I am writing down possible topics, and (almost) decided on this: A site about what Wordpress can do other than creating blogs.

I am a technical writer by profession, and I installed WP internally as a knowledge base, and that's when I started thinking about this niche.

Wish me good luck!! :) (and your mentorship if possible!)