Here is a list of custom or customized pins I have found during my
travels on the interwebs.

Please feel free to add any others you know about that I missed.

Futurama - http://home.comcast.net/~special_when_lit/pwpimages/Futurama%20Pinball.html

Coconut Island - http://www.users.on.net/~spaners/Coconut%20Island/index.html

Bill Paxton Pinball - http://benheck.com/03-16-2010/bill-paxton-pinball

Gooligan's Hooligans - http://1930s.com/pnv/gh2006/index.html

Whoa Nellie (Brand) Big Juicy Melons - http://whizbangpinball.blogspot.com/

Hellacopters - http://www.pinsane.com/pinorama/machines/HELLACOPTERS/qt/index.shtml

MARS ATTACKS - http://home.comcast.net/~josh.kaplan1/mars.htm

Gothic - http://www.phobe.com/pinfools/index.html

Porsche Boxster - http://users.telenet.be/mushroomamusements/projects/projects.htm

Iron Maiden - http://www.ipdb.org/showpic.pl?id=5190&picno=33028

Iron Maiden II - http://www.ipdb.org/showpic.pl?id=5557&picno=44407

Metallica - http://dirtydonnyart.blogspot.com/

Critical Mass - http://www.theyorkshow.com/cm.html

South Park - http://www.pinballreviews.com/southparkcustom.htm

Egg World - http://www.floweringnose.com/_original/i_pinball.htm

Mini Cyclone - http://sites.google.com/site/rumblebelly5/home

Customized Black Hole - http://www.seriousviewers.com/pinball/bhpin.htm

Re-Themed EM - http://forums.arcade-museum.com/showthread.php?t=119129

Akira - http://otomblr.tumblr.com/post/6629878771/all-time-top-most-must-have-want-mr-sam

Beatniks - http://papa.org/2010/07/29/beatniks-koolsville/

Bio shock - http://poormanspinball.blogspot.be/

Dutch Custom - http://student.aii.avans.nl/cmd/bvgeurts/flipperkast.html

Evil Dead - http://www.greatamericanpinball.com/blog/?p=364

Ferrari - http://www.mojopinball.com/

Rush - https://pinside.com/pinball/forum/topic/fs-rush-pinball-with-pics

Silver Bullet - http://s1299.photobucket.com/user/Cryss_Stephens/media/DSC00010_zps80f3a020.jpg.html

Zonderik - http://www.gameroom.be/forum/viewtopic.php?f=1&t=6559

Eyeball Madness - http://pinballsoul.com/eyeball-madness-is-a-beautiful-custom-pinball-machine/

Jupiter Crush - http://www.space-eight.com/Pinball_Jupiter_Crush.html

Retro Spa - http://www.space-eight.com/Pinball_Retro_Spa.html

Tatto Mystique - http://www.space-eight.com/Pinball_Tattoo_Mystique.html

Miss Adventure - http://www.space-eight.com/Pinball_Miss_Adventure.html

World Domination - http://worlddominationpinball.wordpress.com/

Angry Birds - http://www.maaca.org/viewtopic.php?f=41&t=10508

Night of the Living Dead - http://pinventions.com/view-my-customized-machines/night-of-the-living-dead/

** looks like some of the links are now dead I will and try to update them **

Battlestar Galactic - http://home.insightbb.com/%7Egalactica53/BG_Pinball/bgpinball.htm

Astroboy - http://users.chariot.net.au/~barky011/Astroboy.html

Comet Commander - http://www.ece.umd.edu/pinball

machinaZOIS - http://www.aksioma.org/machinazois/photos.htmmachina

Three Stooges -

AC/DC -

Caddy Shack -

Cosmic Colony -

Gyruss - http://www.youtube.com/watch?feature=player_embedded&v=b6psU_M1hdo

_{Post edited by Bowman9: Updating/adding to list}

Yeah, it looks like the website hosting the article is gone.
The wayback machine has the text, but without images
https://web.archive.org/web/20120605085647/http://users.chariot.net.au/~barky011/Astroboy.html

Here is the only image I could find.

astro11.jpg

Betelgeuse had a good write up on how he created his GhostBusters pin, but I can't seem to find it on-line anymore.

Betelgeuse do you still have your write up somewhere on-line?

Night of the living dead:
http://pinventions.com/view-my-customized-machines/night-of-the-living-dead/

Would it be this one?
https://www.sparkfun.com/products/12897

Another DIY Futurama Pin
http://www.pinballinfo.com/community/threads/futurama-is-finished.16543/

https://www.youtube.com/watch?t=24&v=xAPGUUXBJ7c