I’ve found my weekend project! Jakob Skjerning has created a 5 Part Ruby on Rails Tutorial that will have you build a useful web application that enables you to add notes and categorize those notes by tagging. Here are the links to the individual chapters in the tutorial:
Ruby is very easy to install and platform specific installation instructions can be found at the Ruby on Rails website. Also keep in mind that if you don’t want to go through the hassle of installing Ruby on Rails using Apache or another Webserver, you can always use the WEBrick server that comes with Rails. This make running and testing your apps very easy.