So in short you have been trying to reimport your pool for a few hours now, and it's still "running" (in state sleeping).
And it's not zfs-fuse specific, rather zfs specific.
Well nothing much to say here, I know some people on the sun forum have been helpful in the past to recover some data from some zfs pools, but it's been a long time since I heard from them, but if somebody can help it's probably them here.
It's the kind of "nightmare scenario", I guess the controller has probably gone mad for a while, just long enough to make the whole pool unusable. Rather frustrating, considering the number of drives... sorry I can't help more here.