I've added a new feature to TwitterBuzz; you can now see the most recent posts which contained a given link, by clicking on 'Details' beside said link.
Back using Hunchentoot now.
I'm quite amazed at how many people have visited since I set up a few days ago; 1,400 visitors with 2,600 page views, according to Google Analytics. About 50 people have added it to their del.icio.us, as well...
For more on TwitterBuzz see here.