Has anyone done a study on the effects on random dot domain names like de.licio.us and fav.or.it on users? For the life of me, it takes forever to verbally exp

Has anyone done a study on the effects on random dot domain names like de.licio.us and fav.or.it on users? For the life of me, it takes forever to verbally explain to someone how to go to delicious. And now, with favorit I even have to remember to tell people to spell "favour" wrong.