Thanks for the excellent plugin!
I'm having troubles getting the login logo to be HiDPI. I've created the images in both normal and @2x and I'm not sure what do do next as I have a few options.
I have a Woothemes theme, and there's a built in method to upload a new login logo. With this method if I upload the retina image, it's too big, and if I upload the normal it's blurry. This method does upload to the media library, and seem to be too small to generate retina versions (though I'd rather it not anyways since I made my own).
The other method I know a little about is overwriting the core logo file, which (I assume) will be overwritten at some point during a future wordpress update.
Thoughts on how to do this properly?