Fullmaj started a project with an MOS6581 SID chip and a Arduino board. The Arduino board is used to "translate" the Midi signals and commands to a SID chip. Features: Control of the SID over Arduino Hardware SPI interface. Midi Receive interface through Opto-coupler and Led visualization of Midi Traffic. On the blog of Fullmaj you can find a sound sample, the schematic and the firmware.