In the old SWISS page there was a schedule for introduction of the 343 in SWISS schedule.
Not all US destinations will be served regulary with the new 343. The first one to be served is infact LAX
starting on the 27st. November. The 2nd. and last will be JFK
in January 2004.
I believe JFK
will be served by the 343 is to show the flagship to the most popular airport in USA, normally all the airlines like to fly to JFK
with their latest airliner. But I also think besides LAX
SWISS 343 will eventually fly once in a while to other US destinations.