Tony,
I am trying to skip some cells based on more complex logic than just if a column is editable or not. Also in some cases I need to move down in the grid instead of across the grid. For now I redefine $.fn.nextCell in my code, this seems to be working nicely. It took me a while to figure out that grid methods are associated with $.fn and not with the grid itself. I understand that this is a jquery plugin technique, still it is a bit surprising 🙂
Marius