Google+ has hit 10M users since it re-opened the invites. And that fact was confirmed by the co-founder CEO Larry Page during Google's earnings report conference held just a few days back. So there should be more than that figure by now and that number is growing by the minute. That adoption rate is quite fast for a social networking channel considering this service is invite only.
While G+ is hitting high it still has a lot of features application developers are looking for. G+ has yet to publish an API for developers to use. And for us end-users, the much awaited RSS feature is not yet there. While waiting for it, third party developers have published RSS modules for G+.
But wait, what is RSS? RSS is a way to check websites for updates or recent changes. It gets updated content from a website and presents it back to the requestor in a generally accepted format in the form of XML.
One RSS for G+ is published by site plusfeed.appspot.com. On the page instructions, it tells you to append your G+ profile ID after the URL.
How do you get your profile ID? Browse this URL plus.google.com/me. The URL plus.google.com/me will be replaced with an address containing your profile ID. Copy and append that ID to the plusfeed.appspot.com so it now becomes http://plusfeed.appspot.com/xxxxxxxx (where xxxxxxxx is your profile ID).
Here's my G+ profile ID RSS feed: http://plusfeed.appspot.com/114267385974993155330. That long list of numbers trailing the appspot URL is my profile ID, yours should look similar. The RSS feed of my profile is below.
From the snapshot above you can see that my G+ profile RSS feed is empty. This is because I haven't shared anything public yet. So what does this mean for you? You can use this tool to check if you have shared something public but is not meant to be shared publicly.
The RSS feed above is checking only the public profile. And it is a testament to the privacy that G+ offers to its users.