I haven’t used these Perl classes yet, but they look really good:
These classes make use of the Syndic8 Web Services interface. This is definitely one of my favorite parts of the site; many applications and tools run on top of it. In fact, the fact that I had experience with building and running a web site platform most definitely helped me get my current job.
Right now we process about 2 million XML-RPC calls per day. This includes pings, which come in at a rate of 10 to 15 per minute.