A Sample UserControl to demonstrate a very simple example of using Cross List/Site Queries to gather information from more than one list/site and display the result.
Note: This file has references to the AJAX Control Toolkit and AJAX Extensions, so if you don't have those things configured, simply remove the references from the top of the file and then remove the <asp:UpdatePanel> tag and it's closing tag - and you're set.
I'm keeping it there because I'm about to develop this UserControl a bit more with dynamic queries that use AJAX for presentation.