I don't know what happened to this card, but also am wondering what's going on. Bank of Hawaii use to issue a Hawaiian Air card also but it's also no longer advertised on their website. There use to be adverstisements for the card in Hana Hou magazine (HA's inflight magazine) but it's also no longer there.
Bank of Hawaii outsourced the Cards to Barkleys
First Hawaiian bank has a decent card
I hope it comes back eventually, I was interested in this card mostly for the transferrability to Hilton
That being said...I really hope it doesn't come back for a limited time while I'm in the garden...that would be quite a terrible temptation to resist...