Hi BlueEng, yes there is another international (primary) school at Silvermine Bay/Mui Wo: South Lantau International School. It is much smaller than DBIS but it is a wonderful school much loved by students and parents alike. It is best placed for those living at South Lantau but there is a bus that runs from DB for students living there - note that the trip takes 45 minutes each way on a road that resembles the Kokoda Track in places!
I may have confused the issue somewhat, but just to clarify, there is NO ESF school on Lantau. They are building an "ESF International" school in DB that isn't due for completion until 2008/09 - the ESF in its title is misleading. It will (roughly) follow the ESF guidelines and curriculum but essentially it will be a privately run International school with comparable fees. Current waiting lists for the DBIS are around 18 months to 2 years for kindergaten and other early classes, so the ESF International school should provide a welcome shortening of entry times for primary school kids when it is completed. Hope this helps, PM me if you require more detailed info.
Cheers.