I had written a post about mobile friendly websites in my main site. And this blog currently supports mobile browsers !
As you know this blog runs on wordpress, wordpress has plugin option through which you can add useful features in a short time. I have used a plugin to add the mobile friendly feature to it.
This blog shows up in a mobile friendly way when seen using a mobile phone browser, you cannot make this until you check it using a mobile phone.
People who browse using mobile phones are on the rise, hence it is important for a webmaster to treat these visitors properly.
Do you have a website? If so, is it mobile friendly?