For anyone that has worked with CardSpace, there was always a lot of guess work that went into it building out your user interface because here was never a static logo that we could use to inform a user that a site was InfoCard ready. Finally, a new logo has been released, that we can all use. In a variety of formats.
The purple is, ehhhh, interesting. I would have perhaps went a SharePoint bluish color, but I guess I have no say. I wonder if you can change the hues of it to your own color and not have MS get mad. The purple would look kind of silly on a SharePoint login page, it would be nice to be able to adjust it.