Unity 4 is coming soon. With the ability to retarget animation, use Mocap (motion capture), render AAA quality, publish for Linux, and easier organization of assets, and much much more, it is sure to be great.
Pre order now to get $200 dollars off Unity Pro. Of course, Unity Indy is still free, however it should be noted that one of the new features in Unity 4 will not be available for the Indy version ; that feature being the ability to use IK (inverse kinematics). Just so you know, so if you are a big IK fan, but you don’t have $1300, then don’t get your hopes up. But other than that, most of the great new features in Unity 4 will also be available in Unity 4 Indy version.
Learn more about Unity 4 and all other things Unity at http://unity3d.com.