One benefit to using the road rage for multiple pedals is that you can power things different ways. So for example, you could run one at ~18v, one at 12V using a regulator, one at 9V using the jumper, and another a -9V, all without interfering with one another or causing any hum or other issues.
You could also run multiple pedals at ~18V or at 15V, or 12V, or -9V, which is a big benefit. For example, you could run a rangemaster and a fuzzface in one enclosure using -9V from one Road Rage while supplying the box with one Boss standard power supply. Huge benefit right? You could run an OCD clone and a Zendrive clone using 18V on both, again powered with just one 9V boss standard plug. All easily done, all a great benefit.
As mentioned, you do have to think about power draw though. Using an LT1054 for multiple pedals is a good idea, just make sure you find a way to deal with the problem with pin 1 on the LT1054.
Jacob