I linked to a long list of sites to ping when you update your blog a few days ago. Well, now that I’ve finally used it I found that a bunch are borked. The functioning list is past the jump.
http://rpc.pingomatic.com/
http://rcs.datashed.net/RPC2
http://bitacoras.net/ping/
http://blog.goo.ne.jp/XMLRPC
http://rpc.pingomatic.com/
http://rpc.weblogs.com/RPC2
http://xmlrpc.blogg.de/