Index: signup.module
===================================================================
--- signup.module	(revision 222)
+++ signup.module	(working copy)
@@ -700,6 +700,23 @@
           }
         }
       }
+      
+      // If this new user's email address matches any anonymous signups,
+      // link the new user to those signups so they can manage them
+      $sql = "SELECT * FROM {signup_log} WHERE uid = 0 AND anon_mail = '%s'";
+      $signups = db_query($sql, $account->mail);
+      while ($signup = db_fetch_object($signups)) {
+        // Remove the anonymous email
+        $signup->anon_mail = '';
+        // Set the uid
+        $signup->uid = $account->uid;
+        // Add the username to the form data
+        $signup->form_data = unserialize($signup->form_data);
+        $signup->form_data['Name'] = $account->name;
+        $signup->form_data = serialize($signup->form_data);
+        // Update the signup record
+        drupal_write_record('signup_log', $signup, 'sid');
+      }
   }
 }