Things I Have Actually Used
Robby Russell is a constant source of information on Ruby and Rails, I have used his instruction on how to set up Rails and PostgreSQL on Mac a number of times. It is therefore fun to see that I have actually used 3 out of the 5 things he wants to know more about::
RSpec User Stories
We were very early adopters of this one, we started using it the same day it hit trunk in a useable form. Everyone should start using it today - I cannot speak highly enough of it. The only thing I miss is a Fit-style table approach to rules, but I have my own thoughts about that one.
Using Selenium with RSpec
I have used it for the dynamic hiding of speaker info for Agila Sverige. Not at all enough to judge a library by, but it feels a lot sweeter than Prototype/RJS.
Yeah, I wanna know more about this as well.
Using the Google Charts API with Rails
Other than that I would love to try out: