This looks like one of the most sensible WYSIWYG web page builders. Thank you for the minimal permissions to sign up with twitter. Might I recommend that you add the preview for the element when you hover over the component on in the tray? Nothing happens when I drag and drop things either -- latest chrome release channel.
There was a slight issue where the mousemove event wouldn't trigger if you dragged too slowly :) That has been fixed. Is it working better for you now?
