Twitter Opens Up Its Analytics Platform To The Public
thenextweb.com
thenextweb.com
Also, all of the links I've posted on my account show 0 clicks. I'm pretty sure at least one of the last 100 links have been clicked at least once... Or else I'm unpopular :P Most likely, there's a lower limit to the number of followers or clicks for the stats to show.
Anyway, great tool.
My company's account has tens of thousands of followers (all organic) and we also see "0 clicks". We know we get a high CTR when including a link in a tweet as we measure it both on Bitly and the site's analytics. I guess the service is still rough around the edges, but looks promising.