Because of the definition of DOCSDIR in Makefile,
'package' and 'deinstall' targets are failed.
DOCSDIR is expanded to usr/share/doc/sqlite3-3.4.2,
but usr/share/doc/sqlite-3.4.2 is correct.

Fix: 

PLIST_FILES=  usr/bin/sqlite3 usr/lib/libsqlite3.so.0 \
                usr/lib/libsqlite3.so.0.8.6
! DOCSDIR=      ${PREFIX}/usr/share/doc/${PORTNAME}-${PORTVERSION}
  PORTDOCS=     README
  MANPREFIX=    ${PREFIX}/usr/share
  MAN1=         sqlite3.1
--- 22,28 ----

  PLIST_FILES=  usr/bin/sqlite3 usr/lib/libsqlite3.so.0 \
                usr/lib/libsqlite3.so.0.8.6
! DOCSDIR=      ${PREFIX}/usr/share/doc/sqlite-${PORTVERSION}
  PORTDOCS=     README
  MANPREFIX=    ${PREFIX}/usr/share
  MAN1=         sqlite3.1--DGMOOQjKOmCANO1yrrbrWlR7ZkBY4oJHjLliZzegQm7fgu0F
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*** Makefile    Tue Apr  7 02:35:44 2009
--- Makefile.new        Tue Apr 28 00:51:36 2009
***************
*** 22,28 ****
How-To-Repeat: Move to /usr/ports/database/linux-f8-sqlite3,
% make package
or
% make install && make deinstall