GameCube/Wii
Required Hardware: GDR8082N USB DVD Drive or Wii
Windows: Use FriiDump 0.5.3
Linux: Use FreeDump 0.5.3
Run FriiDump with no arguments/flags, read the help text.
Using Wii:
Playstation
Windows: Use Alchohol 120%
Linux: cdrdao
Playstation 2
Windows: Use ISOBuster, follow this tut.
Playstation 3
Required Hardware: PS3 w/ CFW or Blu-Ray Drive (?)
Using PS3: Pretty sure MultiMan can do this (?)
Windows: ?
DreamCast
Required Hardware: Broadband Adapter, CD-R Drive
Use httpd-ack for Dreamcast, follow this tut.