Wrong One
You're probably looking for the other Seth Johnson, that is a 317 native. This one is not that one, but you can find that one at http://www.317seth.net .
However, it seems as that Seth has not kept up with paying SquareSpace for that domain so it's in an 'Expired' state.
You can then find the other Seth Johnson on Twitter: https://twitter.com/sethvthem/
You can also find the other Seth Johnson via their NuVo Writer Profile: https://www.nuvo.net/users/profile/seth%20johnson/Â