FYI according to the Hawaiian air website, they will no longer interline bags unless the flights are on the same PNR (record locator).
So essentially if you are like me, who books separate tickets on Delta and Hawaiian, I will now need to pick up my bags in Honolulu and recheck them. i.e. Flying back from Kauai to Honolulu to Atlanta, I will now need to pick up the bags in Honolulu and recheck them on Delta. A big hassle and very customer unfriendly move. No Aloha spirit at all. This has been confirmed by several posters on flyertalk as well. I encourage everyone to write complaint emails/letters to Hawaiian Airlines.