According to the local news report, Hong Kong telecom operator 3HK will announce the plans on Monday.  Users need to register first, and they need to queue up at the specific places to buy the iPhone 3G. The local shop will not sell the iPhone 3G for the first day to avoid any chaos on the street.

Hong Kong is in Asia region and it is in GMT+8 time zone. Thats why iPhone 3G will arrive earlier than the US.