If you like it, you may be interested in how I'm making it.  Here are some of the tools (the materials) I use.  The credit all goes to these guys for making it easy to put something together: 

Operating System: Ubuntu 10.10 (Lubuntu flavor) 

Server: Apache 2.2 

Language/Framework: 

Ruby on Rails (Ruby v 1.8.7; Rails v 3.0.1) 

Javascript Library: Dojo Toolkit 1.5.0 

Basically, that's it.  All these tools are freely available for anyone.

Some other minor details: 

Dynamic address set up with Dyndns.org. 

Computer is a Phenom II 560, with 8GB RAM, 2TB HDD, using < 200W.