s getOrElse None

doubleOpt.join

scala> import scalaz._; import Scalaz._
import scalaz._
import Scalaz._

scala> some(some("X")).join
res0: Option[java.lang.String] = Some(X)

scala> some(none[String]).join
res1: Option[String] = None

scala> none[Option[String]].join
res3: Option[String] = None

s.flatten

s.flatten.headOption

scala> Some(Some("foo")).get
res0: Some[java.lang.String] = Some(foo)

scala> Some(None).get
res1: None.type = None