Wordpress + Syndication?

I’m not sure if “syndication” is the right word here, but I’m in need of an plugin that would automatically publish my new posts on other sites such as twitter, facebook, and maybe some social bookmarking sites…

I’ve been searching for a few days and haven’t really struck gold with anything I’ve found. Does anybody know of any good ones?

You don’t necessarily need a plugin. I publish my blog updates to Twitter via http://twitterfeed.com and you can also use TwitterFeed to publish to Facebook.