It was featured quite prominently on the Exocortex website, while still being under development,
but now it can only be found as part of all the other Exocortex Documentation as far as I can tell...
Is it dead or is it still being developed? Is it per chance close to a public release?
Or will it remain available only "under a development arrangement" as originally stated?
I know: those are all NDA-defying questions, but I'd really like to know as it always looked quite stunning...
(http://vimeo.com/album/270955)
From the Wayback Machine:
MaelstromFX employs unique and patent pending technology in order to solve the Navier-Stokes equations on an adaptive tetrahedral mesh. This produces very high quality 3D fluid effects for film. The application has performance and scaling advantages over traditional voxel based systems. Although the mathematics are more complex the artist has more flexibility to use different sized tets to represent regions in a scene for the right effect and visual fidelity. In general, this reduces the overall simulation mesh size and thus speed up simulation. These smaller meshes can produce very high quality fluid effects and can scale much larger than uniform voxel meshes.
The first version of MaelstromFX currently supports simulation for air flow including dense smoke, wispy smoke, fog, haze, wind, and liquids. Support for fire and explosions is expected in the future.