Good OSS Project for REST / Resource Examples

Hi,

I'm pretty new to rails, though not to web development generally. I love
the simplicity of the RESTful controller design approach - many small
classes with less responsibilities sounds good to me - but I'm
struggling to find any rich examples that will answer the questions I
have as I try to apply the principles in the real world.

Some good resources I've found have been
* railscasts routing episodes: http://railscasts.com/tags/14
* jamis buick's blog:
http://weblog.jamisbuck.org/2007/2/5/nesting-resources

...but I still feel like I'm thrashing around a bit.

So it strikes me that the best thing would be too root around in someone
else's code. Can anyone recommend an open-source rails app which would
serve as a guiding light to me on my quest?

thanks,
Matt