UPDATE: After 122 days in beta is is clear for all to see that WordPress Answers provides great content and many high-quality answers.
However, the pool of experts is far too small. This is born-out by the "Worrying" number of users and only "Okay" answer ratio.
I would of expected the Wordpress comunity to jumped on my question over at wordpress.stackexchange.com but that didn't happen.
I can only conclude that as per Joel's blog post, WordPress should just be a tag in StackOverflow and ServerFault.
There is no point in duplicating efforts/questions/answers.
That said, CMS systems do span; system admin, programming and web design. I could see the possibility of a content management StackExchange. Hopefuly this will be created with a merge of WordPress, Drupal, CMS Development, Joomla etc.
Single CMS flavours are too narrow.