Ok. #tags auto linking is now live. #tags within the post are only used for referencing and do not tag the post itself. This might lead to confusion in the future. Will definitely keep an eye on this in terms of usability.
One reason for this is that we don't want users to spam #tags at the end of a post. That's why we limited tag usage to three. Another reason is if I want this post to show up under
/daniel/tags/Shimatta I would have to explicitly add a #Shimatta tag. What if that word doesn't even appear in the content of the post? Having a separate tags field gets rid of artificially adding #tags and makes categorizing posts and the content itself a lot cleaner.