Hi Alex,
The multi-GPU fluid code is finished in regards to capability, but not finished in regards to usability. The current beta requires a reasonable number of command line variables, for example, to bind GPUs and threads to cores, to pad the subdomains to give small prime factors, and so on. Filip (the main programmer for this code) has started working on automating all of this, but it still might be some months before a release.
The GPU elastic code is also working, however, Kristian (the main programmer for this code) is currently implementing higher-order time-stepping schemes to improve performance. Again, probably some months away before a release.
Brad.