(2006-09-20) Iskold Social Bookmark Faceoff

Alex Iskold compared Social Bookmarking services.

He discovered that StumbleUpon has more users (1.3M) than Del.icio.us (1.0M). (Macro Statistics)

He did a separate interview with the StumbleUpon folks. Del.icio.us is primarily an organizational tool, one to store and access your bookmarks from anywhere. It's about enhancing memory and recall. StumbleUpon is more about personalized content discovery and assisting navigation.

Mar'2007 update: Jason Kottke discovered that FotoLog seems to have passed FlickR in usage (Web Traffic).