If you want to get a good feel for the community (which is the greatest thing about ruby), take a look at the following:
- John Nunemaker's Rails Tips (really good blog)
- Dr Nic's Blog
- Josh Susser's has_many :through
- Jamis Buck's the { buckblogs :here}
- David Heinemeier Hansson's Loud Thinking
DHH's blog does not really give too much technical insite, but I feel it is really good to read if you want to understand the community. Too many people refer to it when they are writing, plus his posts tend to be interesting (to me).
When bored I like to take a look at Ruby Flow and Ruby Inside, it is a great place to discover new blogs.