I was on FOS first week in Dec 2012. No Package. I was on Vision of seas mid Dec 2012 they had the package but they only offered the premium one. This may have changed for 2013.
Is it worth it, depends. I have purchased the drink packages on Celebrity before. I thought was worth it. Mixed drinks run from $8-$12 ea. 5 or 6 drinks a day. I spent a lot of time at the martini bar and all of there drinks where $12. But if you are Diamond and above may not be worth it to purchase package.
One thing to keep in mind on witch package to purchase. You can not pay the different if you want something more expensive. If you get the $45 a day one.
A note you can now bring on 2 bottles of wine per cabin.
My 2 cents