Well, I found it VERY interesting : it is cool and attractive and COOL!
As I found, Paranoid Android is based on CM9. And Galaxy Ace has a port of Paranoid Android working. So I think it is possible to port this for our Legend, isn't it?
I'm trying the port ( for now just for me. I'll ask permissions and give credits before releasing anything... If I'll ever release anything... ) . I found a "guide" ( it is not so clear, or at least, not so for me ) here, and I yet can't understand where I have to change the framework...
If anyone can help me, I would be very glad. Thanks.