I just post a list of programs that might be helpfull to check to see how your design
can be percieved by several types of colorblind people.
(Or if you are colorblind, to get a better view of the design, like a plugin for firefox)
The list comes from this site
http://www.kleurenblindheid.nl/kleuren/software.shtml
but that is in dutch so I just show the list here.
Some are for windows and MAC, some just for one of the flavors.
Some are free, share/donateware, try before you buy etc.

http://www.ryobi-sol.co.jp/visolve/en/download.html
https://addons.mozilla.org/en-US/fir.../versions/5001
http://colororacle.cartography.ch/manual.html
http://www.fujitsu.com/global/access.../download.html
http://michelf.com/projects/sim-daltonism/
http://www.vischeck.com/
http://colorfilter.wickline.org/
http://www.colorhelper.com/trybuy.php
http://www.iamcal.com/toys/colors/
http://www.inetia.com/en/eyedropper/download/
http://www.hikarun.com/e/
http://www.colblindor.com/color-name-hue/

Hope that this can be usefull to some of the designers
or even for the colorblind themselves