There's a variety of different Powerbook AC adapters that all use that modified RCA plug, so don't make the assumption that it'll work just because it fits - check the voltage/amperage! The Pismo (or at least mine) runs on 24v, 1.875a.
Anyway, congratulations! The Pismo is a very nice machine, though I think of it as more an OS9 system than an OSX one (then again, I've never used any OSX other than 10.4, so I'm not sure that 10.0 won't perform better on a G3.)
Anyway, congratulations! The Pismo is a very nice machine, though I think of it as more an OS9 system than an OSX one (then again, I've never used any OSX other than 10.4, so I'm not sure that 10.0 won't perform better on a G3.)