Some kernel developers now have their blogs hosted on people.kernel.org, which is a WriteFreely instance with ActivityPub syndication. For example, try out @gregkh.
See more here:
https://people.kernel.org/read
selea 
@monsieuricon @erictapen @gregkh wow this is super exiting.
@monsieuricon this is great
@monsieuricon i don't see a post on our mastodon instance. I would like to comment a post from there. https://chaos.social/web/accounts/184117
@monsieuricon @davidak Right, Mastodon doesn't automatically pull in existing posts when it discovers an account on another instance. But once someone on your instance is following an account, new posts will show up there.
To get around this, you can search for the full URL of a blog post from your Mastodon search bar -- that'll make it fetch / import the post so you can interact with it.
@write_as @monsieuricon @davidak there is no way to see old ones?
@erdnaxeli @monsieuricon @davidak Individually searching for old ones from Mastodon should pull each one in.
@write_as @monsieuricon @davidak I can confirme it works!
@write_as @monsieuricon @davidak still a weird behavior imo
@erdnaxeli @monsieuricon @davidak Indeed. There's a very old issue to fix it that I've tried to push along, but there seemingly isn't much interest in it: https://github.com/tootsuite/mastodon/issues/34
You can also follow me there as @monsieuricon