Dino Esposito has published a great article on customizing the ASP.NET 2.0 GridView control, and shows how you can use it to look like the Hotmail inbox:
One thing he doesn't cover, but which is pretty darn cool, is that you can wrap it within an <atlas:updatepanel> and add some additional Atlas Control Toolbox controls to the page and have it be completely Ajax and cross-platform too (which is pretty sweet).
You can read the article here.
Hope this helps,
P.S. Scott Mitchell is writing 35+ step-by-step articles on databinding scenarios with ASP.NET 2.0 that is really going to rock. He builds a DAL and then a Business Layer with the first two articles, and then spends the remainder showing off pretty much every common scenario you can think of against them (master/details, master/details/details, inline editing, sorting, paging, deleting, insertion, hierarchical, optimistic concurrency, scoped transactions, etc, etc). I just reviewed the first 10 this past weekend and they are awesome. We'll get them published on the web in the next few weeks.