CoralCDN is far more superior. AKAIK, one its main main goals is to help survive front-page placements on popular sites. Its also far more easier to use. Since you mention it here is the CoralCDN for this article: http://www.avos.com.nyud.net/delicious-press-release/ . The only problem I find with CoralCDN is that if you try accessing a URL that is already down with CoralCDN and has not been cached by Coral it probably won't work. The Google cache would be far more effective in such a case.