http://www.siliconchip.com.au/Issue/2014/October/Digital+Effects+Processor+For+Guitars-Musical+Instruments
they also listed an Digital Echo/Reverb unit back in February ... http://www.siliconchip.com.au/Issue/2014/February (http://www.siliconchip.com.au/Issue/2014/February) ...
The project from February is basically the same thing as the one Stephen posted, the same PCB is also in a project from November 2013. Looks like they keep reusing it just re-badged as different things.
There's another thread about it here http://www.diystompboxes.com/smfforum/index.php?topic=108778 (http://www.diystompboxes.com/smfforum/index.php?topic=108778) If you want to get into digital effects and don't mind a bit of SMD soldering it's not a bad way to go.