Clarified readme regarding named update.

README.md

@@ -70,7 +70,19 @@ You can of course still have a larger control of your loops:
 ;; => (-1 4 -9 16 -25 36 -49 64 -81 100)
 ```
 
-Named updates have a bug, sadly.
+Named updates have a bug, sadly, but works if there is only _one_ instance of the iteration macro. This doesn't curretnly work, but will in a little time:
+
+```
+;; Shamelessly stolen from Taylor Campbell's foof-loop documentation
+(loop continue ((:for element (in-list list))
+                (:acc satisfied (in  '()))
+                (:acc  unsatisfied  (in '())))
+   => (values (reverse satisfied)
+              (reverse unsatisfied))
+   (if (predicate element)
+       (continue (=> satisfied (cons element satisfied)))
+       (continue (=> unsatisfied (cons element unsatisfied))))))
+```
 
 
 ## Todo