Questions about mixamo

Can you use pre-rigged characters in Mixamo?

How good is its support with blender 2.5?

i tested the service some months ago, and well, i can import the model to blender, i don’t remember the file format, fbx or collada¿? the mesh all with triangles instead of the quads i sent. the skin were good, but expensive. there is a tool inside mixamo to map your existing bones with the skeleton they give you.