Forget Vinagre, forget Terminal Services Client, because there's one tool now available that combines the best of both into one : GRDC. It's a gnome tool that allows you to create a series of VNC and RDP entries (shortcuts if you like) and then launch them with a double-click. I've nominated it for sysadmin tool of the year in Sourceforge's community awards for 2009. Please support its author with a click.