News of Twitter adopting rel=”nofollow” is disturbing.
Sure links from Twitter can be abused, because Twitter profiles are so heavily interlinked.
What they should have done is stuck nofollow on your “twitter blogroll” links thus making each Twitter account a little more independent and negating the benefit of building up mass friendships for more than traffic generation.
It isn’t a minor thing, Twitter has just become another “Wikipedia”, a black hole sucking in link juice and only allowing it to flow internally .
I would no longer class Twitter as a microblogging application , because in many ways the content you submit is being used for search engine manipulation.
This isn’t the same as the Technorati or Del.icio.us use of nofollow, because both of those services also use internal nofollow.
Looks like Twitter has just become a prime contender to be added to Lucia’s No Spam Old Links plugin (provides an interface to add nofollow to old links in your content )
So now you can’t get any link love at all when thought leaders like Robert Scoble link to you from their Twitter account, or their Google Reader link blog (which gets fed to Twitter)
That does still drive a certain amount of traffic, but the links no longer carry any kind of “vote” of editorial approval.