As of June 2013, a prosoundnetwork.com article indicates that the firewire recording interface of this mixer utilises the DICE chipset. It is not currently known how well FFADO's generic DICE driver and mixer might work with this. It will probably come down to how many vendor-specific extensions are used. We also do not yet know the vendor/model IDs.
Thanks to Jano on the ffado-user mailing list for the heads-up about this device.