I published a new module on the CPAN : ARGV::URL. At import time it'll process @ARGV to allow handling of URLs as transparently as filenames in one-liners. Here are a few examples of its power.
Show the count of fans for Delicious's user dolmen:
$ perl -MARGV::URL -MJSON -E 'say "Fans: ", (decode_json <>)->[2]->{n}' http://feeds.delicious.com/v2/json/userinfo/dolmen Fans: 9
Show lines starting with 'ftp ' in the document at the given URL:
$ perl -MARGV::URL -nlE 'say if /^ftp /' http://www.iana.org/assignments/port-numbers ftp 21/tcp File Transfer [Control] ftp 21/udp File Transfer [Control] ftp 21/sctp FTP