Currently, they are not. The intention is to port the entire model to a point where it can be distributed through BOINC.
I have considered an umbrella project, but see no need for it. Once I have work units functioning as intended, setting up a BOINC server takes all of a single afternoon.
How much CPU power do you actually need?
This is hard to answer. More compute affords me a higher resolution in the same timeframe.
I see. Thanks! Just to repeat: this is a damned good project and example of science on BOINC :)