Is there any estimation on when Steam version will be released?
My estimate is sometime around the end of next week. I know that it can't be any earlier than the 12th as Steam's rules means you need to wait a set number of days after making your page live.
I can't be sure how quick they will review + approve the full game but for the demo it was only a couple of days so I think the end of next week is a decently likely timeline.