Following up on Ivan's excellent suggestion, I regret to say I 
couldn't find the suggested #do:withSeparator method in the Squeak 
release.  Am I missing something?

Perhaps I misunderstood that he was suggesting the addition of a 
method to the collection, or perhaps he was suggesting an enumerator 
present in other Smalltalks?  If so, this only brings me back to the 
questions noted in my original message:

	(1) What idiom should be used, if any, for this operation; and
	(2) Should we routinely make changes to Collection for this 
sort of thing?  What criteria should be used to decide when to do so?