Strata Studio Pro 2.5.3 is the latest according to their website. There is another 10 lots up for bid at ubid.com. Current bid needed is $17. I am sure it will go up by the time the bidding is over on Thursday. The auction I was in closed on Sunday. I got the software on Tuesday! Check out their website. www.strata.com Losts of stuff, particles, collison detection, bones, etc. in the program. They list the software at $949! It looks great, don't know why its at auction. I am just glad it was. Can never have enough toys! :) PE www.planet-3d.com