GNU sed version 4.2.1:

ftp://ftp.gnu.org/pub/gnu/sed/sed-4.2.1.tar.gz.

Online manual pages can be found at:

http://www.gnu.org/software/sed/manual/sed.html

Join the Seder mailing list:
Discussions on sed and regular expressions.
To join this mailing list, please visit

http://groups.yahoo.com/group/sed-users

Seders grab bag
has a script archive, links to tutorials, etc.

Sed Cheat Sheets
Cheat sheets for sed.

Web pages by seders:

Eric Pement
	sed page: http://www.student.northpark.edu/pemente/sed/index.htm. sed FAQ file: http://www.student.northpark.edu/pemente/sed/sedfaq.html contains introductions, many links, examples, .... sed 1-liner: http://www.student.northpark.edu/pemente/sed/sed1line.txt provides elegant solutions to many problems.

Sven Guckes
	http://www.math.fu-berlin.de/~guckes/sed

Benny Pedersen
	http://2dos.homepage.dk/batutil/help/SED.HTM