So why for the Amiga then? Well, the Network Processing Unit, or short NPU, is actually an MPC8343E PowerPC CPU running at 400MHz. The card also had 64MB DDR RAM on-board.
Here's a picture of the card with mega-awesomeness-superduper heat sink:
That NPU can be used to run WarpOS software when plugged into the Mediator:
This is a cheap alternative to the more expensive PPC accelerator cards. It only has 64MB on-board so don't expect running Quake III on it. Currently people are looking whether or not the on-board RAM can be upgraded by the means of modding.