Import/Export animations

is it possible to export animations done in other Packages (such as XSI, Maya, LW, 3ds Max, C4D, etc ) to Blender ? Modelling, texturing done in Blender, but getting animation from other packages of those characters/objects (I dont know if thats possible, but since theres people importing Motion Capture files between 3d plataforms, I’m suposing from what I hear people saying, I Would like to know, if we could do the same, even if in Motion Capture format)

Someone already mentioned FBX, from what I’ve read about it, the import is not yet fully implemented ? (There are some scripts working that out) and I’ve also found some info about Collada