There are a few things that the custom grid does that you cannot do with tables in the Rally SDK– specifically re-ranking items.
For an app that I am making, incorporating a custom grid would work well, but I would like to be able to configure them programatically– e.g. set up column names and widths, query parameters, etc. and then have that be a portion of my app– I might set up a few grids in the app with different query parameters.
It that possible?
It’s not possible. Yet.
We are working hard on a shiny new App SDK based on the Ext JS Framework. It will have a lot of the same features you are familiar with in Rally (like the grid w/ re-ranking, inline editing, etc).
Watch for it later this spring/summer!