Posted today on the twitter blog, they have made it easier to find out all about who is mentioning you in their tweets. In the past, you had to go to Search.Twitter.com and search for your user name to see all those who had mentioned you. Now they list them all under the tab on the right hand sidebar.
“What an excellent enhancement to twitter replies.”
Replies Are Now Mentions
We’re updating the Replies feature and referring to it instead as Mentions. In your Twitter sidebar you’ll now see your own @username tab. When you click that tab, you’ll see a list of all tweets referencing your account with the @username convention anywhere in the tweet—instead of only at the beginning which is how it used to work. So for me it would be all mentions of @biz. For developers, this update will also be included in the APIs.