The latest version is the Micro World version- where you're about a 1/4 inch tall and everything else is huge. You have to survive were there is ants, bees, beetles, spiders, etc. Instead of trees you have to chop down grass blades or weeds for "wood".
I hate to be literal but I don't know if there will be an 8.9...maybe there will be but I just haven't heard. The full release of the game is in november and we are at 1.7.3...I doubt there will be that many updates in that amount of time...Although I'm sure that even after the full release, there might be constant updates to the game.