The Somali pirates just released a Yemeni ship without ransom. The wise and all-knowing Greasy Rider Blog has predicted from the start that they'll eventually release the big Saudi oil tanker without ransom. Could this facilitate that? Maybe they're trying to save face by releasing this ship first--and then say something like how they're not going to hold any boats owned by Muslim countries. If that's their game, they'll also be saving their lives in the process.
It's not about the oil, though. It never is.