If you work a lot with lists larger than, say, a 100 items (for instance, the list of emails in your inbox), it quickly becomes difficult and tedious to find a specific item without resorting to filtering, searching, sorting, and/or grouping functions. Especially, sorting and grouping greatly improves the structuring of the items in a list, and it is a feature that I would want to apply to all my lists, by default. In particular, I've been looking for a list/grid control that allows arranging and grouping of similar items together, much like the grid (or list?) used in Outlook 2003.