3) good question, but I hate to say it looks that way.... anybody else think differently?
It's better than putting an Amiga sticker on an abomination. This way you still have your Amiga AND additional power. SharkPPC is no less amiga than an 030 A1200 if you ask me.
But sometimes I play doom on the miggy, using the PPC processor, and the graphic card and the ram that are connected to it. I feel I'm just using the Amiga's Joystick and power supply this way!