Spend some time going through a sample ASP.NET MVC application that hosts a number of Infragistics NetAdvantage ASP.NET controls. Learn about the approach that makes using server controls in MVC possible and how to overcome some common obstacles.
Update 2009-06-09:
The video suggests using a server script block and to use the Page_Load method to load the grids. A more concise alternative would be to simply use a syntax like the following code:
<%
wdg.DataSource = this.Model.People;
wdg.DataBind();
%>
<ig:WebDataGrid ID="wdg"
runat="server" Width="50%"
EnableViewState="false">
</ig:WebDataGrid>