Would love to buy one for my A4000D. I love OS4.1 but it runs really slow on my A1200T and I am in the position of do I go with a Sam or wait for something else. Truly, I'd prefer to use my mediator equipped A4000D over the A1200T but I simply can't due to lack of a PPC for the machine.
I also understand you don't have OS4.x compatibility atm, but hopefully that would come. Finally, I would love to have all the extras you describe there; USB, Video, etc...
I agree an 060 or an A1200 version would be nice but I'd be happy with the current spec since my A4000D is what is lacking extras ATM.