try pinging the remote site before you call the  get method. It will tell you if the remote site is online.. not if any specific service is started.. but if the machine has an ip and is responding.

Net::Ping can help you get it all together. Here is an idea to get you going. This doesn't work but its the general idea.

#!/perl -w

use strict;
use Net::Ping;

#Make object using default TCP
my $p = Net::Ping->new();

#Construct an array of remote sites however you like
#Read from a file or hardcoded etc.  (file would be best)
my @remote_sites = qw(111.1.2.22 222.1.11.15);

#Loop through the sites
foreach(@remote_sites)
{
   #pseudo-code here because I don't use LWP.. but 
   #you understand what's going on right?
   attempt_LWP_Get if $p->ping($_);
}
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