I'll try and document the journaling stuff soon... but basically, it allows for a full record of all updates/deletes/inserts into your database that has occurred. It's actually quite intriguing for highly data-sensitive but non traffic-intensive web applications (e.g. mission critical internal web applications that are data intensive).
(It is NOT recommended for large scale, highly trafficked web applications since there is a processor overhead for journaling)
I'll try and post more later.
In the meantime, I just wanted to let folks know that the Qcodo.com website itself and the Examples site has been updated to v0.4.18 for ongoing testing of the current release. Please do let me know if you encounter any issues.
Thanks!