I have working code here: 404 Error
(it's a directory, the source is thermo.c)
This is not Arduino source code, however, only the code which outputs a char (or byte)
is hardware dependent. You only need to replace this routine with Arduino code.
If you can read C language, then here you have a working example,
shifting out 24 bits, 8 at a time.
And i am also getting an Arduino PCB soon 