This website is built on WordPress (self-hosted). I use a cloud server from VPS.net to host my website and use Cloudflare and NetDNA (MaxCDN) for added security and website performance. The premium theme I am using is XPro, developed by Themeco.
I also used Michael Hyatt’s GetNoticed premium theme, which I can highly recommend, if you want to built a blog-based platform fast, without spending too much time on sorting out technical intricacies.
For hosting your WordPress blog or website, I recommend — apart from VPS.net — WP Engine for high traffic sites and 1&1 for low traffic sites. I use both hosting providers for some sites and have had good experiences in terms of stability, up-time and performance.