This is just a fantastic way to waste half an hour.
Go to http://dotsies.org/about/ and have a read. If you’re into typography or crypto (it’s not crypto, but it’s obscure enough that no-one’ll be able to read it) then I’d expect you to like this.
On their main page they use a really interesting method to help you learn the font by gradually removing the normal letters until you’re reading it unaided at the bottom of the page.
There’s a bookmarklet that lets you convert any page you’re reading to dotsies, but personally, I find it hard to read simply because the font is too small. A couple of hits of Ctrl-+ though and it’s fine.
Nerd fun 🙂