"So could anyone tell me:  (3) Where to get the DS1603."

Dallas Semiconductor has a small-order desk that will take 1-10 piece
orders charged to credit cards.  Call +1-214-450-0448.  I've only used
them once, but found them very friendly.

                                Paul Milazzo <milazzo@bbn.com>
                                BBN Systems and Technologies
                                Cambridge, MA