I am going to make parts of my Pyratone sound system available for DIY projects - possibly as a replacer for the SID :-)
Currently I am designing a system to incorporate both, the sound engine as well as dsp-processors into one FPGA. (My latest system with a Cyclone IV and Spartan beeing used on stage covers about 6-8 FPGAs altogether and runs on eval boards of Altera and Xilinx which is not suitable for normal designers or musicians).
Now, I first found a module which seems to make it possible to offer functions for a reasonable price beeing interesting also for DIY.
Several pa