For our Legends of the Green Dragon game we wanted to ping Technorati the daily news. This helps us advertise the game, and gave me a chance to explore XML-RPC and python a little bit. And I do mean a little bit, look at the code

import xmlrpclib

rpc = xmlrpclib.Server('http://rpc.technorati.com/rpc/ping')
response = rpc.weblogUpdates.ping('[SDF1] Legends Of The Green Dragon - Daily News', 'http://lotgd.sdf1.net/news.php',)

print 'Technorati Replies: ' + response.get('message')

Crazy eh? 3 lines of actual code to send the ping, the 4th only to display if the ping was successful. Put the script in a cron job that runs once every day and your all set.