While it makes very little sense from a money saving, or (from HK Island) even convenience perspective, I'd quite like to be able to drive to Macau. Seems only a small quota can drive into the city but that there's a large car park at the end of the bridge where you can take a bus or taxi into town.
Transport department have an application process where for HKD540 you get a 12mth permit for the bridge from the HK and Macau sides sorted as well as a statutory filing for the Mainland (as it's their bridge/waters).
Unfortunately you also need car insurance for Macau and the Mainland before you can actually legally drive across and that seems to be more of a challenge. Has anyone actually managed to get cover in place without spending stupid amounts of money?
Really can't believe that in the 10 years they were planning and building this thing they couldn't put some common laws and ordinances in place to facilitate local cover being valid (at least for the crossing to the car parks).