Is this features added or will it be in the grid
1. Sorting - Exists through the API if you use our IGGridViewDataSourceHelper classes as your datasource.
2. Summaries - We don't currently have a summary engine in the grid. You can add your own summaries to the Section Headers if you'd like though through the IGGridViewDataSource protocol.
3. Band Headers - I'm not 100% sure what you're asking here. We have section headers, which is similar to a group by feature in grids on other platoforms.
4. Fixed Columns - Currently we do not have fixed column support in this version of the grid.
Hope this helps clarify, if you have any additional questions please don't hesitate to ask.