Start Google Plus is a great extension for Chrome and Firefox that lets you update Twitter and Facebook from within Google+, also adding feeds from both social networks onto your main page. We mentioned it in our Facebook to Google+ migration guide, but felt it deserved to be highlighted on its own because it's so useful.To get started, you just download the extension and install it like any other, then log into Google+ and authorise both your Twitter and Facebook accounts. Once you've done that, you'll see your Twitter stream and Facebook news feed show up in your Google+ feed. This is really great if you want to go to a single location for all your updates, but if it's too much in one place you can always just turn it off.
What's really useful is the ability to post status updates to all three services directly from Google+. The extension adds buttons to select which networks your messages gets posted to and those buttons live right by where you add which circles and specific people get to see your message. You can toggle them on and off, so it's really easy to make changes on a message-by-message basis.
If you want everything in one place, Start Google Plus is a really great way to make that happen.
We received lots of tips from lots of people about this extension before posting it in the guide and, of course, right here, so thanks to everyone who let us know!