No ~ operator for box, point

decibel=# select version();PostgreSQL 8.3devel on i386-apple-darwin8.8.2, compiled by GCC i686-apple-darwin8-gcc-4.0.1
(GCC)4.0.1 (Apple Computer, Inc. build 5363)
 

decibel=# select box '((0,0),(2,2))' ~ point '(1,1)';
ERROR:  operator does not exist: box ~ point
LINE 1: select box '((0,0),(2,2))' ~ point '(1,1)';

Any reason this doesn't exist?
-- 
Jim Nasby                                            jim@nasby.net
EnterpriseDB      http://enterprisedb.com      512.569.9461 (cell)