Here the links to amazon with availability info (I got the availability data from Panasonic, not from amazon):
Panasonic GF1 with 14-45mm Lens ($899,95) Available early October
Panasonic GF1 with 20mm f/1.7 lens ($899,95) Available in October
Panasonic 20mm f/1.7 lens – Availability early October
Panasonic 45mm f/2.8 lens – Available in November
UPDATE: I made a mistake. The GF1+14-45 lens will be available early October!