I like this three bin system, that way each one can be at a different stage (one with fresh cuttings/organic material, one ready to be used and one somewhere in between)--my dad described a system his grandpa had that was like this
Vertical Succulent Garden by floragrubb: 20 x 20" panels with 45 slanted cells to support planats and soil when mounted vertically. The unit in the picture is made of 6 panels, each $79. Now, if I could only figure out how to make the panels myself..