Just picked up some useful tips from a Google IO video on Chrome Dev Tools.
Command Line API
See the Firebug Wiki, Chrome Dev Tools is based on most of these commands.
clear(), clears the screen
dir(document.body), gives you the current HTML in DOM view.
document.body, gives you the current HTML in the console.
inspect(document.body), open element in the brackets in the Dev Tools "Element" tab.
If you are in the "Element" tab with an element selected, in the console, if you type $0, the console with display the element.
If you type $0.outerHTML, the console will log the contents of the HTML element selected in the "Element" view.
To copy the contents of the above, you can simply enter copy($0.outerHTML) in the console. This will copy the contents of $0.outerHTML to the clipboard.
I need to go and have another look at this but essentially remote debugging allows you to control web browsing debugging (e.g. Dev Tools) from one browser session (e.g. Chrome stable) to another (e.g. Canary) or another device which browser's uses webkit.