Can it be controlled with ipod, iphone or ipad?
Can it run Amarra?
Do you guys stand behind your product - support/warranty/future upgrades?
Thanks 
Yes, you can use a ipod, iphone, ipad, another mac, or even a PC to control the Mach2 MacMini. With these options, you don't even need a monitor, mouse , or keyboard at the music rack.
You can absolutely run Amarra. The GIK Acoustics/BPT, Empirical Audio/Salk room at RMAF, used our Mach2 MacMini with Amarra.
In fact, we are becoming Amarra and Pure Music resellers (deal made at RMAF). You will be able to buy the Amarra and/or PureMusic directly from us. We will install and configure it for you at no additional charge.
We already have optimization scripts for Play.app, iTunes, Amarra, Pure Music, and Pandora. They got a good field test at the show.
The Apple warranty is still intact. They are fine with memory and upgrades. For the software, we but a back-up image on the hard drive we return to you. If you have problems we will try to talk you through debugging it. If we can't figure it out quickly over the phone, the back up will restore you to our Original state. It take 12-15 minutes in total.
Of course if you keep an itunes Library, you should make your own backup periodically...
Apple updates will work fine on our setup. If/when release the sucessor to Snow Leopard, there will be a fee for upgrades, as it will be a major overhaul of everything. We don't expect that anytime soon.
Darrell