...which means that it will be available online at Barnes & Noble, the Apple Bookstore, Sony, Kobo, Diesel and others within a few days to a couple weeks. It is already available on Smashwords and Amazon.
Smashwords often seems to have a queue for this approval process for 'Premium Distribution'. In two of the last three books, I made a special request for 'expedited' approval after the book sat for three weeks or so in a 'Pending Approval' status (in this case since about May 5th). I knew it would be approved since it passed the 'autovetter' process and didn't have any format issues. That's what can hold up things. Some people just need a little prompting.