For anyone who ever wondered what a poke on Facebook does:
What is a poke?
A little gnome armed with a stick pops out of your CD drive and runs all the way to your target and pokes them in the eye. This is why it takes longer for people on other continents to recieve your poke. You cannot use the poke function again until your gnome has returned to your computer. If your poking gnome gets lost or eaten email the facebook team for a new one.