I was surprised to discover that the 2006 OS version of the Nokia 770 Internet Tablet now has perl:
Nokia770-26:~# perl -v
This is perl, v5.8.3 built for arm-linux-gnueabi-thread-multi
Copyright 1987-2003, Larry Wall
Perl may be copied only under the terms of either the Artistic License or the
GNU General Public License, which may be found in the Perl 5 source kit.
Complete documentation for Perl, including FAQ lists, should be found on
this system using `man perl' or `perldoc perl'. If you have access to the
Internet, point your browser at http://www.perl.com/, the Perl Home Page.