As if the Blogger and metaweblog API weren't bad enough with positional parameters (which were then overloaded with magical means, like <subject> in the body positional parameter meant a subject was included, which was then parsed out), we now have blo.gs or whoever extending the "ping" API with "extendedPing" which just adds more positional parameters.
What's so hard about named parameters? That's a "hash" or "dict" or "collection" or "associative array" depending on your language. *sigh*