The latest version (v0.3.0) of the FPP Falcon Pi Player has the ability to output up to 1 universe of 2801 pixels directly off the expansion header. As my 2801DC15 and 2801DC30 boards are essentially 2801 pixels that give DC dimmer outputs I have been wondering over the last few days whether anyone has actually hooked 1 up successfully. If they have and can supply info here I will add info to the user manuals, the ACL wiki and my website. Other than the limited distance that you can separate pixel controllers and individual pixels I reckon a PI and some 2801DC boards can make a very easy way to control dumb elements. With the ability to daisy chain Pi's you can do all sorts of good things.