Tony Amblés released an open beta version of his GPU accelerated SPH/DEM solver for Maya. It will be free until the end of the year, so be sure to download and test it while you have the chance! There is also a forum that can be used for bug reports, feature suggestions and the like.
(DEM solver simulation)
(SPH solver simulation)
According to Tony Amblés, both simulations were created using a Nvidia GTX 670. I think the results and performance look pretty promising and it would just be awesome to have a GPU accelerated fluid solver integrated into Maya.
Just downloaded the beta and will hopefully have some time to test it on the weekend. Cheers Mr. Amblés! Great work - keep it up! :)