Ok, so I went a little crazy, broke down and bought the EF-42 speedlight for my Fuji. It's expensive as crap, but boy is it a powerhouse. You could probably take a picture in the pitch black dark, at 30 yards with it.
Guide number: 138 @ ISO 100.
Cameras: Canon's G12, and A1200. Sony DSC-H90. Fuji HS35EXR.