According to the page, "This is the new unix port of push. It should work on any unices supported by plan 9 port(a unix Plan 9 compatibility layer, it's available at http://swtch.com/plan9port/please install it first).", but I am a bit puzzled, since, when I unpack the archive, the source code is in limbo. Now, I have nothing against limbo (or Inferno), but I wasn't aware that plan9port includes a limbo compiler. Does anyone know if there is a C version of push somewhere? I'm asking here, since I imagine some of the contributors to push may be reading this list.