Many users are experts in areas which they don't need to ask questions on, yet there knowledge is only spread in the stackexchange world through the answering of questions.
It would be fantastic if users had the option of blogging about certain areas, integrated into their user profiles, which are also searchable, allowing them to blog about their areas of expertise, and still be integrated into stackexchange.
This could even be a status symbol if you only allow users with a certain reputation in an area, to blog on that topic.
EDIT following replies:
- I believe not all blog posts can be covered by raising a question and then answering it, some topics do not lend themselves to that paradigm.
- Linking to a blog is not the same as having it's content in the stackexchange network. The content is not searchable in stack, is not associated with tags, voted on, or commented on in the same way.
- A blog post does fit into a Q&A paradigm, in that it is a sharing of knowledge, however typically on a more complicated scenario, like how to configure something, how to best approach a particular problem, etc.
- This functionality doesn't have to be used by everyone, but would add to the scope of the stackexchange set of websites, and would have a beneficial impact on their use on the internet.
So I still see this as being worthwhile, and in the stackexchange set of sites interests to introduce.
This would also help to ensure, that blog posts which are linked from stack answers, will be available instead of vanishing at some point in the future.
(Some answers need comprehensive replies, which need detail which it's better to link to someone's blog post, then to copy and past the content from it.)