Here [hypnocube.com/Docs/UserManual_1_0.pdf] is a PDF of the user manual for the new 4Ã—4Ã—4 HypnoCube and the 8Ã—8 HypnoSquare. This pertain only to devices bought after Feb 2008.
There are two sample programs with C++ sourcecode showing how to interact with the new devices. Both files are zip files containing Visual Studio 2005 projects. Read the above Manual for more information.