I like this. TypePad is letting bloggers who are Facebook members to automagically notify the Facebook newsfeed when they post stories.
Offering Facebook Beacon on TypePad means that you can now choose to share your new blog posts with your friends on Facebook. (Everything TypePad: Features)
Smart of TypePad to make this an opt-in feature. For each blog, you choose whether to be prompted to send the stories to FB in the blog's configuration.

Can't the other sites using beacon do the same? why wouldn't zappos or overstock market this as an opt-in feature to their users?
One thing I don't get about the negative response: don't you have to click OK to these dialogues before the item is added to your feed? I mean, that could be a bit clearer from a usability POV, but all the prompts I've seen make it pretty clear that you can delete any story or that you can say OK.