I am going to start off with
Damn that’s Brave
Matt was commenting on the Wikipedia announcement , and made the following statement.
Hmm excerpt? – Matt please forgive me, but it is so short I am going to include it all.
Wikipedia has decided to nofollow all external links to help offset people spamming the service. In theory this should work perfectly, but in practice although all major blogging tools did this two years ago and comment and trackback spam is still 100 times worse now. In hindsight, I donâ€™t think nofollow had much of an effect, though Iâ€™m still glad we tried it.
Backend technology is effective, such as Akismet or other plugins, nofollow just doesn’t work.
Nofollow still has its uses for controlling the flow of pagerank around your own pages.
You can use a plugin to remove it from comments, or just hack the code.
Matt, can we have a simple option in WP 2.2 just to switch nofollow off?
Unrelated to Matt, but have you seen how many blogs are using “black hole” in relation to link equity and nofollow with Wikipedia… without giving me credit?
Here is the original Wikipedia Black Hole Theory