South by South Mess 2

The folks over South by South Mess are at it again.  They have five parties next week that they promise will be "the messiest parties of SXSW 2012."  One of the parties is a Slip N Slide party.  Sounds fun!
If you can decipher the cryptic poster above you will unearth a pretty awesome lineup including the buzzalicious Grimes, Maps & Atlases, Japanther, Dan Deacon, and more.  Can you figure out the rest of the lineup?  They have a handy page where you can RSVP to all five parties.

RSVP