<Asp:ListView> is the new control in town !
ASP.NET 3.5 coming with this control is probably the popular one.
This supports paging, sorting, insertion, deletion, and all that is not there in the DataList (since Asp.net 1.x, 2.0)
and complete HTML markup control.
When it comes to DataList, which doesnt support paging and sorting operations but support showing
the rows over the columns (Horizontal manner), it is definetely a releif for developers.
Stay tuned to Scott Gu's Blog as more posts are expected on it.
cheers !