Blogging about web hosting can be rewarding and very profitable due to the nature of affiliate businesses in this field. This may be your ultimate business idea if you are interested in web hosting, website development, and internet tech in general. Target budding/aspiring entrepreneurs, web designers, and bloggers looking forward to building websites and blogging and whatnot.
Build and share website/blog creation tutorials, reviews of hosting companies and services and technical articles around usage and troubleshooting of hosting accounts. Help others with their online presence and you will be building your business empire in that process.
Blog Name Idea: HostingGirls.com