Further, there are only three days left.. The HN title should be changed away from "Riak 1.0".

This is actually an announcement of RC1 being released:

http://downloads.basho.com/riak/riak-1.0.0rc1/

I just did a rolling upgrade from 1.0b4, and it went smoothly. I love the LevelDB support, and it's holding up well under the considerable load that I'm throwing at it.

Riak 1.0.0 RC2 is out now, and "later this month" is only 3 more days.

I think when you've got your release candidate, you're basically done, barring any unexpected surprises. Given stable Riak has been during the beta period, I don't think they're really jumping the gun much.