Update 8/11/10 Turns out one need only be logged in to Twitter to see NNT’s tweets. It does appear the RSS feed is also login protected.

Update 8/8/10 It would appear NNT has “protected” his tweets. Not sure what that means exactly. There is the option to Send Request. Never seen that before. It looks to me like NNT has managed to turn Twitter into an anti-social media!