"Things only work at social network scale when the entire network can focus their attention on relatively few items. That’s why the News Feed works, but the global Like doesn’t."
—
Haystack Blog » Facebook’s ‘Like’ button makes me lonely (via jryu)
Rafer sez:
Nearly true, but not exactly. If you can take the real time out of it and show results over a long period, the number of items can be much higher. MyBlogLog widgets have no time-date stamps for exactly this reason.