I found this entry by following the other. This one deserves to be here on merit, hence I posted it.

Disclaimer: I have no connection with the author, my PhD is in Graph Theory.

Perfectly fine to do; even better if you post it yourself. If the posts are interesting, they'll get upvoted. If not, they won't.

Yes, self posts are perfectly fine, as long as you don't overspam.

I'm the blog post author. I just uploaded the reply to the language speed article. I was actually very surprised when I woke up today and saw thousands of entries in my access log and referrals from social news sites.