Flagging Parts that have been superceded...

[Richard Fleming]

Hello all - 
   
  Has anyone dealt with supercedures in any nifty way? For instance, Maytag's 
old belt1 is now replaced with the new and improved belt2. Is there any way to 
flag or at least alert a user to the change in either sales order or cart 
checkout?
   
  Could a product "id" type of "Substitution" be used to produce an alert?
   
  Thanks in advance.
   
  Rick