We are so excited about this one! This is our second component build upon our own bfFramework and replaces our old mosKnowledgebase component.
Joomla Knowledgebase will be released to a select few under a closed beta program later today – once we have received and processed the feedback from that we will be releasing our first public beta of Joomla Knowledgebase.
Joomla Knowledgebase now uses our bfFramework, that has been recently upgraded to provide xAJAX 0.5 RC versions and other enhancements such as object caching and templating. With templating you can design and publish internal templates to areas of Joomla Knowledgebase with ease!
Joomla Knowledgebase is an elegant knowledgebase/FAQ/Content manager for Joomla. In its final state there will be two versions, one for Joomla 1.0.x and one for Joomla 1.5 – both components will have the same features (But can only be installed on the version designed for – you buy once and get both versions!)
We are busy developing a migration strategy for existing mosKB users, and redeveloping a dedicated website for Joomla Knowledbase – as soon as it is finished we will let you go and play with the online demo 
If you are a current mosKnowledgebase user – and are happy to test beta software, then please contact us letting us know your experience level with mosKB and with PHP Code – we can add you and a few more testers in the coming days…