I have a module that replaces LWP's HTTP and HTTPS backend with AnyEvent::HTTP allowing you to easily do parallel requests using Coro threads. I'll try to publish it tonight or tomorrow night.

my @threads;
for (...) {
   push @threads, async {
      ... do LWP stuff here ...
   };
}

$_->join() for @threads;
[download]

Update: Oh yeah, Coro already provides some kind of support for HTTP through LWP, but it's hackish and it doesn't work with HTTPS.