By default we post to our community, but we know that's not for everyone so by clicking the settings option when you create a question you can select the following:
Soon we will allow users to set their default post method too, as we know some people will want to post in comments by default all the time.
Oh, that's cool! At least users can choose whether to post it as a comment or as a blog. Thank you for clearing that out.
!CTP