Hey guys I'm the one of the developers for blogstack.io. With the addition of nip23 we have some solid support for long form content like blogs and articles.
One pretty cool feature is that the relay that the blog was posted on is encoded in the blog url (naddr....). So you should be able to post a blog to any site that implements nip23 on any relay you want and you'll be able to look it up on blogstack seemlessly.