We picked up a lot of fun slang stuff like calling everyone "cousin" or ugly/sexy/crazy cousin... using the Shaka (Good job! Awesome! Rock on!)... and just the language in general. Hawaiian is just wonderful language; I have a feeling I'll be using it a lot for a while so don't be surprised if I say any of the following:
Mahalo : Thanks
Hana Hou: Do it again! / Encore!
Ohana: Family (as everyone knows!)
Aloha: Hello / Good bye / Welcome / I love you / I'm sorry / We are one in the same, I "get" you
No Ka Oi: The Best!
And I must say, North Shore, O'ahu No Ka Oi!
(More in depth update, checking e-mail/lj, and delving back into the world in general once I get some sleep -- I've been up for 36 hours and counting!)