extra features added to this google box:
turns off 'safe searching'
returns 100 results per page
adds 'after' and 'before' keywords
to search for pages last updated before january 20th 2001, type:
[your query] before:2001-1-20
to search for pages last updated between may 30th 2001 and december 13th 2002, type:
[your query] after:2001-5-30 before:2002-12-13
no guarantees are made as to wheter the dates are inclusive or exclusive ranges.