I still cannot access the continental site as of 1300 EST 6/30. Have been trying for 2 days. I finally was able to "backdoor" it however. I went to the continental canadian reservations site at
http://www.continental.com/ca/default.asp then brought up the flight search page, then switched to the United States residents link. I was able to then book my tickets as usual, with the exception that the seat selector won't display. But if I try and go back and access my reservation in the normal fashion, no dice........