Thanks for the updated information, salva.

The install-multiple command was not available when I originally wrote the OP. I'm not sure when it was introduced: the oldest perlbrew doco I can find on CPAN, perlbrew v0.56 (dated ~9 months after this thread was started), did not have it.

It's good to see this 2-year old thread is still being read. I've added a short "Update 2014" to the OP.