Mention Mustek USB2 backend.

unsupported/mustek-bearpaw-2448-cu-pro.html

@@ -43,7 +43,12 @@ L6219 - well known stepper motor controller.
 </pre>
     <h2>Comments</h2>
     <p>
-      Similar to the Mustek BearPaw 2448TA Pro?
+      Maybe this scanner will be supported by <a
+      href="http://www.meier-geinitz.de/sane/mustek_usb2-backend/">the Mustek
+	USB2 backend</a> later.
+    </p>
+    <p>
+      Similar to the Mustek BearPaw 2448TA Pro, but uses CIS instead of CCD.
     </p>
     <p>
       On the case of the scanner the following is written: "BearPaw 2448CU Pro