Good day!
Alot of people were confused around here, so I thought I'd clear this up.

This week's issue of Shounen Jump (#51, it will go on sale on Monday 16th Nov in Japan) did not have a One Piece chapter.
Next Jump (#52) is going to have chapter 564.
Jump after that (#53, scans of which will start appearing on the internet on 26th Nov, realeased officialy on Nov 30th) will contain
Chapter 0. It's a flashback story about matters that happened in One Piece over 20 years ago, including the past of Movie 10th main antogonist, Golden Lion Shiki. Most luckily (not confirmed yet, but according to most of the rumors), issue 53 will not include chapter 565, but instead
Chapter Zero will be over 30 pages long.
One Piece Film: Strong World will go in theathers on December 12th 2009. First 1,000,000 of movie goers will resive
Volume Zero as a gift.
Volume 0 will include
Chapter 0 and other materials and sketches for the film done by Eiichiro Oda.
Strong World artbook, containing all sketches Oda did for Movie 10th, will be on sale starting December 18th.
(
Artbook Add here)
Chapter 0 was already animated into anime-special. Starting this monday untill January 15th 2010, there will be a contest-lottery held in Japan. 3,000 of winners will recive the DVD with animated Chapter 0.
Do not expect to see the animated special any sooner then in 2 month time, ater Jan 15th. ( Victorine Add here )Info Credits: Shounen Jump Adds; Anime News Network; most pictures hosted by Kyoushirowolf @ APforums