Does anyone know if this is possible? I'm a Star Trek fan, and there's this screensaver that's for Windows that mimics a Star Trek systems panel, and I'd love to have that on Ubuntu (so would some of my friends).
Many Windows screensavers can be run in Wine.
Assuming your screensaver is stored in your Downloads folder, just run
wine ~\Downloads\startrekscreensaver.scr /s in your Terminal.
Windows screensavers have not been integrated into Linux so you won't be able to easily set them as your screensaver.
You could also try installing
xscreensaver-gl-extra for more screensaver choices. Many of these screensavers come with configuration options that can be modified with the default gnome-screensaver; you will need you to install
xscreensaver to change those options.