The credits for this wonderful application go to Emil. I am sure many of the DB residents on this site use it already. For those who don't here is the link to download it:
Discovery Bay Residents' Electronic Timetable
I used it on a Motorola, Sony Ericson and now on an LG phone, Mr. Elle used it on a Nokia and now on a Blackberry. It works a treat and contains all ferry time tables (including the Mui Wo and Peng Chau ferries) and all bus lines (including the village buses).
Just update it from time to time, Emil goes to great lengths to input the public holidays.