I try (not always successfully) to avoid deeply nested constructs.  
When I can't escape nesting, rather than directly nesting, I favor  
writing something like:

def case_A
   case
   when ...
   when ...
   end
end

def case_B
   case
   when ...
   when ...
   end
end

case
when condition_A then case_A
when condition_B then case_B
end

Regards, Morton

On Jul 19, 2006, at 7:06 AM, dblack / wobblini.net wrote:

> In any, ummmm, case... :-)  I'm glad to be reminded of it.  Do you use
> it when things get more deeply nested?