Surprised that this wasn't posted yet, and it's late March already. Fanime will be held on Memorial Day weekend (Friday, May 22 through Monday, May 25). This year's One Piece gathering is tentatively scheduled for Saturday, May 23, at 11:30am at the fountains on the Marriot side. This will be my first year going so I'm not really sure where that location is.
Here is the cosplay.com link to the actual gathering info: One Piece 09 Gathering, organized by member blkriku.
Here is the official link from the Fanime forums: Official One Piece Gathering 09, also organized by blkriku.
Suupaa Kaizoku Cosplay is hoping to attend in full force. And by full force, I mean military force. Personally, I'm planning to attend as Aokiji for the gathering. I don't know if I'm going to bring another costume for the other days, but it might be a good idea since I'd rather not stain the almost all-white costume. Either way, I just have to get off my lazy-ass and actually finish the costume. So fellow AP cosplayers…who's attending and what are you planning to go as? Looking forward to seeing you at the con!
There is also a general Shounen Jump gathering on Sunday at 3pm at "fountains in front Hilton side." Again, I don't know where that location is, I'll just see it when I get there.