Guys, Microsoft bought Caligari (or at least Truespace). It was their decision to release it for free, so people could have something to use to create models for Virtual Earth (I'm guessing to compete with Google). They're not going to time-limit or feature-limit it. It's the full version, completely free. You can thank MS for that (shudder), since they were apparently too lazy to create their own modeling app and instead bought someone else's.