Viz is offering a free One Piece retrospective this week only over viz manga service. It includes
The One Piece Retrospective offers 114 pages of One Piece coverage, including:
• Interview with Eiichiro Oda
• Special One-Shot Chapter "Strong World"
• Color Spreads
• Cover Gallery of All 69 One Piece Graphic Novels
More info here http://shonenjump.viz.com/node/1859