Until an actual Linux driver for Blync is released, the Web Service wrapper I created here might help.
What you can do is:
1. Connect the Blync light to a Windows machine 2. Install the Web Service on this Windows machine 3. Configure Incinga/Nagios to call the Web Service from your Linux machine to make the Blync light show the color matching the Incinga/Nagios status.
I'm not sure if Incinga/Nagios can call the web service directly but the web service can be called from within a Linux shell or Perl script. Then its just a matter of having Incinga/Nagios call the Linux shell or Perl script on whenever there is a status change.