Etihad Guest members are eligible for double miles on new routes operated by Etihad for the first 30 days of operation.
You can combine this with other offers that Etihad periodically runs such as the current double/triple miles offer that you can read more here.
You can access this offer on Etihad’s website here.
Here are the new Etihad routes for 2014 that are eligible for the bonus.
Etihad, the smallest of the three “big” gulf carriers, has the most promotions for bonus miles of them. They have been building a mini alliance striking deals with number of airlines and taking equity positions on many of them