To suggest that there's nothing between the pickaxe and rubyquiz is
ridiculous.  There's plenty of opportunities.  As others have said,
this list is an excellent way to learn, first by reading and
understanding, but then as James said, by contributing.

I find teaching (contributing) to be the best vehicle for learning. 
It forces you to really fill in the gaps in your own understanding as
you work through it.  Plus, if there are still gaps, others will
kindly point those out as well. :)

In addition, there's such things as IRC, RubyConf, RailsConf, Rails
Studio, etc.. etc..

Michael