the xml-rpc interface to weblogs.com
ken coar finds the xml-rpc interface to weblogs.com distasteful. use the http post interface. and ignore the result. who cares if it fails? (and ping blo.gs too!)
supporting the trackback api on blo.gs is an interesting idea. on the todo list. (but i see a problem—trackback sends the blog name and the url for the entry, but not the url for the blog.)