Newsflow can be moved to any Desktop, by using Mission Control. You can simply drag and drop the Newsflow window.
You can also assign Newsflow to a certain Desktop, with a secondary click on the Dock icon by using the Options sub menu. Even if you like you can assign it to be shown on All Desktops.
Prefernces / Genearal / "Show on the right side of the screen" is an available option to stick the app to the right side of your screen.