Topic: Free Ruby on Rails Book
Our friends over at SitePoint have decided to make the PDF version of "Build Your Own Ruby on Rails Web Applications" by Patrick Lenz free to download for the next 60 days.
Check it out at: http://rails.sitepoint.com/
We advertised the print version of the book for awhile up on top of Rails Forum. It's a great beginner resource that walks you through creating a complete app (a social news site similar to digg). It's a good overview and free, so you can't really lose.
Definitely check it out as the free offer expires in a couple of months.