I have just tested Streemian and it still does not appear to work for scheduled posts. This post is a test of Steem Auto and it's scheduled post function. Setting this entry to post after one hour.
If you are seeing this post then it is confirmation that steemauto.com's scheduled post function works as advertised and YAY! For anyone who isn't using scheduled posting...this could change things for you...like allow you to actually take a vacation and not have to interrupt it :).
If you have found this helpful, don't forget to upvote :D