Over on Reddit a One Piece manga colouring group has formed and are colouring from Chapter 700. Currently they are up to 702 and the deadline for 703 is 31/10/2013.
Also they are seeking members to help out with colouring the chapters so if you are capable of doing so hit them up on Reddit over here.
I'll keep this post updated when a new chapter comes out. Also mods if my thread is in the wrong place feel free to move it.