I just compiled fluid~ for OS X (10.5.7) and here it is the link where you can find fluid~.pd_darwin for 10.5 and 10.4.

10.5 version is tested with Pd  0.41.4-extended and Pd-0.42-5, remember that you will need to install FluidSynth library to make [fluid~] work with Pd.

Koray