I've given the website a bit of an update so I can more easily post articles. I have maintained the existing content which was predominantly about Volkswagen/Audi group communication protocols and my ECU tuning software. Here is a quick overview.
VAG Blocks is open source (GPLv3) beta software for reading VAG group specific measuring blocks from an OBD-II port using an ELM327 type adapter.
PPD Maps is open source (GPLv3) software for identifying engine control maps in Siemens PPD ECUs.
VW Transport Protocol 2.0
The TP 2.0 page contains some information on Volkswagen's CAN bus transport protocol.