i2s on raspberry pi

Hi everybody!

I am very happy user of RaspyFi (running for over 100 days and counting!) but I started looking for a better solution than the built-in jack. I am looking for relative simplicity and plug-and-play, and I got quite interested in i2s solution. I’ve found a page comparing various raspy i2s solutions but cannot find it now - could you help out please?

Found following:

hifiberry.com/

Would it support the hardware mixer, as shown here?