Just an idea for you guys;
If you look into the new Ubuntu Linux that was just released, download the server install cd... This gives you the option of installing a LAMP server (Linux Apache MySQL PHP). This uses a barebones linux install giving you all the functionality you need to run STAMP.
Upside is that this is all free software, downside is you need to have some linux experience to get it going. I can offer the suggestion of running Webmin for configuration purposes. If any of you would like to undertake this project and need some assistance please feel free to contact me. I'm always excited to open new people up to Linux.
-Adam
Ubuntu Server
Webmin
My Stamp Server (work in process)