Implicit kicks explicit's ass
breasy.com
breasy.com
1. Implicit is better because it avoids people's corrupted "conscious" minds.
2. Implicit is better because it is harder to game.
The corollary to #2 is: An implicit system can, in fact, be gamed, but it requires cleverness/sleuthing/persistence/money/massive organization/etc/etc...whatever the situation calls for. Google uses 40+ variables to determine what gets on the front page. Digg uses 1 variable.
...if something smells funny on Digg's front page, it's usually pretty clear, and it's pretty obvious _what_ is going on. There's one method to game Digg, and because of the simplicity, the community and the admins should be able to put in counter-measures that are equally simple. With google...eh. Who knows? It's security through obscurity. One thing is certain: The well-pageranked of google are an enduring elite, whose only real enemies are the heuristic wizards deep within google itself.