Custom Web Site Administration Tool

I need to build a tool for managing membership roles and users that will run on the production website and scale up as needed. I've come across a couple article that discuss creating a version of the ASP.NET Website Administration Tool. Here are the three that look most promising (thought I haven't dug too deeply into them yet)

4Guys: http://aspnet.4guysfromrolla.com/articles/052307-1.aspx

Peter Kellner: http://msdn.microsoft.com/en-us/library/aa478947.aspx

Adrian Tarjoianu: http://www.beansoftware.com/ASP.NET-Tutorials/Web-Site-Administration-Tool.aspx

Has anyone worked with any of these? Any alternative recommendations?

Thanks
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