[Animats]

Nature did not make all articles free to view. That's a misleading announcement. What they did is far more limited. If you have a paid Nature subscription, you can get a link which you can send to someone else. They can then read a DRM-protected PDF-like file through a proprietary on-line viewer.

If you want to read an article right now, it's $18 and up. Or you can now "rent" the article for $3.99 and up and view it in their proprietary viewer for a short period.

This is decidedly not "open access publication".