I can't speak for anyone else but I'm curious about where Stephen got "Thrillerburke." Personally, I was prepared to just use/expect Thriller Bark or Barque until something more definitive came along (much like people always spelled it "Eneas Lobby" before it finally appeared as "Enies Lobby")
I looked up Burke a little bit on Wiki and Google, just for starters. Though nothing useful, I think, as the only "burke" that looked possibly related was a ghost town in Idaho. Considering the Euro-theme we've apparently got going at the moment this is unlikely the proper source. There are some Burkes in austrailia, but none of them were occult-related that I could tell. Maybe a person?
ADD-ON: I'm wondering personally if Brook really will become a permanent crew member. Cool as it would be and all, I'm kind of doubting it. The reason is an element that is subtle, but present all the same. While I may easily be over-thinking this, it seems the crew knows too much about him. If you think about it, the crew has (on-panel at least) not shared a great deal about one another to the rest.
- Nobody knew anything about Luffy's past, if their reactions to his family are any indication.
- Zoro's never told anybody about Kuina, and all scenes involving his past and Tashigi mostly featured Zoro on his own.
- Luffy's the only one who seems to know Usopp's connection to Yasopp and Shanks.
- Luffy is also the only one to have any information on Sanji, due to Sanji's revealing Zeff ate his own leg for Sanji's sake.
- Sanji and Usopp are the only ones know Nami's full past. Luffy knows a bit, due to the final moments of Arlong Park.
- In the anime, Dr. Kureha told Sanji and Nami Chopper's past. However in the manga the flashback occurred while Luffy was mid-punch.
- Robin had her "job interview" upon joining. But through that and Enies Lobby all the crew truly knows is that Robin got her bounty at age 8 and her homeland was destroyed by the Buster Call. None of them know details.
- The Franky Family told the crew Franky was a pirate's son. And they may know a little about Tom (Usopp at least, knows a bit from being present at Franky's arrest).
Here, however, Brook has told the entire crew all about himself. At least everything currently relevant (his being a shadowless skeleton and why). There may be some "yet to be revealed" in his history while alive, but it just feels like he's an arc-only character. Among his main roles being to give exposition on the situations within the Florian Triangle and Thrillerburke.
Of course that's just my opinion. I could be wrong.
P.S. Pending reason to do otherwise, I'm going to use "Thriller Barque." It's my personal favorite of th current options.