The Load Balancer is a PHP script installed here on sourceforge.net that helps distributing the signature requests equally on all mirrors that participate.
This is done by randomly choosing one and then sending a HTML-forwarding to the client.
Currently the Load Balancing System has processed requests and consists of 0 mirrors located in different countries all over the world. A total number of 0 requests per day is possible.
In addition to that, you may also use a different URL syntax for the Load Balancer. This enables you to put the signature even in boards that block PHP-images. If you use the URL-generator for your URL, you will also get the matching one in the alternative syntax.
How to get a Load Balancer address: Simply use the URL-generator or change the server part in your existing address to http://boincwapstats.sourceforge.net/.