Awesome work, I have been using your script for the past year and am really glad to have a version without the need for java.
I would like to note that a fresh install of Ubuntu 12.04.1 already includes the libgtk2-perl package. However I did need to install the libwww-perl package after seeing the following message:
Can't locate LWP/Simple.pm in @INC (@INC contains: /etc/perl /usr/local/lib/perl/5.14.2 /usr/local/share/perl/5.14.2 /usr/lib/perl5 /usr/share/perl5 /usr/lib/perl/5.14 /usr/share/perl/5.14 /usr/local/lib/site_perl .) at ./msjnc line 53.
BEGIN failed--compilation aborted at ./msjnc line 53.