Hey Rick, a good solution is to take a look the umbraco tv videos "Custom sections,trees and pages", specially the video:

http://umbraco.org/help-and-support/video-tutorials/developing-with-umbraco/custom-sections,trees-and-pages/adding-a-custom-tree

After you know how to insert a new node in a custom tree, take a look the source code of the F.A.L.M. Tabular Folder Browser and you can create your own form to show a gridview.

some code for the custom node:

        public override void RenderJS(ref System.Text.StringBuilder Javascript)
        {
            Javascript.Append(
                @"
                        function open..(id)
                        {
                           parent.right.document.location.href = 'plugins/customgridviewform.aspx?id=' + id;
                        }
       
                ");


        }

and for the gridview:

<%@ Page Language="C#"  MasterPageFile="../masterpages/umbracoPage.Master" AutoEventWireup="true" CodeBehind="....ascx.cs" Inherits="..." %>
<%@ Register Namespace="umbraco.uicontrols" Assembly="controls" TagPrefix="umb" %>

<asp:Content ID="Content" ContentPlaceHolderID="body" runat="server">

   
<umb:UmbracoPanel ..>
    <asp:SqlDataSource ID=..>
    </asp:SqlDataSource>
    <asp:GridView ID=...>
    </asp:GridView>
</umb:UmbracoPanel>
   

</asp:Content>

Hope helps.

Jorge

is working on a reply...