Sorry if I've got this in the wrong category, but I thought you might like to know that there is a typo in the link to the PL2303 driver for Mac. The error occurs on this page,
http://learn.adafruit.com/adafruits-ras ... lation-mac
where the link you have to the "Fetch the installer package for the USB drivers from here: http://sourceforge.net/projects/osx-pl2303" is
http://sourceforge.net/projects/osx-pl2303.
and it should have a trailing slash instead of a trailing period, as in
http://sourceforge.net/projects/osx-pl2303/
Thanks, -- bennet

