[ristretto]

There is still no option to automatically cross-post to your facebook. Wait until the G+ platform launches.

[w33ble]

I'm waiting for that ability for Twitter myself. If they could mesh the G+ stream with my Twitter stream, I might be compelled to use it. Buzz got this wrong too, I'm not sure Google understands yet that they can play nice with others and succeed; in fact they have to to succeed. They seem to have their eyes set pretty squarely on a walled garden that can't be extended outside their services, at least so far.

[arcdrag]

Check out Tweetdeck. It does pretty much exactly what you're looking for with FB and Twitter (and whatever other networks you use). G+ just hasn't opened up an API yet for anyone to tap into it.