Some more beta releases and finaly the stable version is planed to be released in summer 2014.
Then there will be a 32 bit versions for older computers or some netbooks, too.
InvestiGateIX Beta 6
64 bit version: investigateix-14.07.05-amd64.iso (812 MB)
The complete source code of all running parts is available inside the live-system and the installed system.
After the release you will find a small archive including the Debian live configs and Investigateix sources here and on git.
The source code of the search engine is available on the Open Semantic Search project site.