Language Spec.

* package or access control for global variables
* named arguments like foo(nation:="german" or nation: "german").
* method to retrieve argument information (need new C API)
* multiple return values, yield values.  maybe imcompatible
* cascading method invocation.
* def Class#method .. end

Hacking Interpreter

* non-blocking open (e.g. named pipe) for thread
* avoid blocking with gethostbyname/gethostbyaddr
* objectify interpreters
* remove rb_eval() recursions
* syntax tree -> bytecode ???
* scrambled script, or script filter

Standard Libraries

* String#scanf(?)
* Object#fmt(?)
* Integer[num], Float[num] (String[str]?, Array[obj]??)
* Stream or Port, abstract superclass of IO.

Extension Libraries

* mod_ruby, FastCGI ruby
* InterBase module
* ptk.rb pTk wrapper that is compatible to tk.rb

Ruby Libraries

* CGI.rb
* httplib.rb, urllib.rb, nttplib.rb, etc.
* format like perl's

Tools

* extension library maker like XS or SWIG
* freeze or undump to bundle everything
* eruby - embedded ruby

Misc

* publish Ruby books
