I'm looking for a good ASP base Client Side control panle for IIS (5). I'll be using the vanilla MMC via Terminal Services for the Server Admin of my server, but would like give users a "Brinkster-Like" control panel that gives basic admin functions over their website. File management, DB Access, hit stats, etc.

Any thing (maybe open source) out there like that?

There arn't many at all. I'd say

- HostingController. IMHO it is at least descent for the end-user.

- H-Sphere. We are currently moving from HC to H-Sphere. This weekend we started rolling out our first H-Sphere boxes and it's really nice - although some features in the Windows version is lacking, such as File manager, directories with password etc

- Write your own
http://www.iisfaq.com/ADSIScripts/
and
http://www.adsi4nt.com/frame.htm

Plus search on ASPIN.com for File manager and you'll find some free scripts to start with