From what I've gathered on the Natami forums
, the developer box will come out first with a 68060 and FPGA-based version of the SuperAGA chipset. That way if there are still chipset bugs, they can be corrected in the FPGA. The cost for these developer systems will not be cheap though, look for $750 to $1000+ US currency.
The second version (tentatively planned) of the Natami will be available about a year later, and have an integrated 68ec040-compatible processor without an MMU. It will be a mass produced chip and have a targeted price of $100 USD each.
As for copyright issues, these will run AmigaOS 3.x and standard A1200/A4000 ROMs which can be obtained quite legally from Cloanto in their AmigaForever package.