This about sums it up: http://developer.symbian.com/forum/message.jspa?messageID=85949
I think it's worth quoting in its entirety:
"Does anyone use Perl? Or are the rumors it's dead true?
Posted: 05-Feb-2009 23:09
Perl is nowhere to be found. There's no perl developer center. No guides. No examples. There are python, PHP,
Perl used to be the language of the web. What happened?