RDT - IDE for Ruby development

I've been assigned to a project which is developed in Ruby. Because I'm not familliar with Ruby, I decided to use some IDE to work on the project. Because i like Eclipse for java/c++ development, my first choice was to look for Eclipse based IDE. Quick google search returned RDT - or rubyeclipse. Of course I've also bookmarked Ruby Tutorial. I'll post more after I play with it a little bit.

Optimize your web apps

While browsing the web, I found nice plugin for firefox called YSlow. It shows you slow aspects of displaying your page. Is it javascript,css,long HTML options ... it's all covered. On the page you can find links to podcast and screencast covering YSlow functionality.