Here are some screenshots of the latest version, wySUwyg 0.1beta3, displaying the new Drag & Drop Sidebar. You can easily drag images, text or html from any tab onto the sidebar and later drag them onto the editor or any other page.
Below are older screenshots of wySUwyg in action. You can see the editor launched in both Windowed and Tabbed mode (launched in a new browser tab).
The editor can either be launched by Right-clicking on a textbox, or from the browser's Tools menu.