The Rack.  Top to bottom it contains:

PowerPro 1620 Power conditioner

Blue Tube Stereo Tube Preamp.  Mainly used for the mic(s) though occasionally a bass or guitar finds its way in there.  Does a nice job of "preconditioning" the sound on its way to the compressor.

dbx 556 Dual Vacuum Tube Compressor  This one kicks ass!  I mean it - it's a very nice compressor.  It made its debut on Squire K's voice in "Sputnik of Love" on the album of the same name.

M-Audio 8x8 MidiSport USB Interface/MIDI patchbay  It is the MIDI nerve center of the setup.  The Cloud Miners have never used MIDI on an album, so this is really for when I'm just playing with myself :).  Cakewalk Sonar is a nice addition to the MidiSport and allows me to sync everything up quite nicely (including the Roland VS-1680).