Majsta has made a fine new Amiga 600 accelerator. It has no CPU but emulates an 680x0 CPU through an FPGA. The card has it's flaws but the core of the FPGA can be updated. It also is open source so other people are trying to improve the core. We will see if that works out.
I have core V1.0 installed. It emulates an 68020 processor and 64MB Fast RAM. Some programs don't work but it's exciting to see new hardware developed.
This accelerator is put together and sold by kipper2k.