[Gavin Sinclair <gsinclair / soyabean.com.au>, 2004-11-29 03.31 CET]
>   Class.get_class
>     Class.get_class("Test::Unit")  -> Test::Unit
>     Class.get_class("not-a-class") -> exception

Class.for_name, as in java.

>     # Should 'get_class' be in Class or in Kernel?

in Module, maybe?