HTML5: contenteditable and localStorage

I came across this great HTML5 tutorial by nettuts to build a very basic to-do list in a couple of minutes by using two features of HTML5.

• contenteditable: governs just the element on which it appears, and that element's children - like a rich text editor control within a page
• localStorage: lets you store data in key value pairs on your user’s machine. The data you store is unique to your domain, so creating a unique name for your key isn’t a huge worry.

html5 localstorage tutorial

While you can play with a demo, expect localStorage to work in Internet Explorer 8, Safari 4, and Firefox 3.5