Be prepared to play it soon on your PC... :))
I've recently build (last week) the very first win version of it!
Now I'm activelly testing it (I change some things about every day)and I'm tuning it just to have something decent on both platforms, mac and win... I'm also changing some ways to control the rider just to make the game easier to play... but not too much...
I just can say that it'll be soon released and I wanted to tell all of you that's not vaporware ;)
But one more time I cannot tell you any date, just not to make myself be under pressure, I really don't have so much spare time to spend in it :(