October, 2010 - Social Search: This is Google's to gather the valuable data from the social graph that Facebook has and Google so covets because it could be the next evolution of search. Many Google users have become used to these added search results by now, although I haven't found them too useful. This is another no-brainer for eventual integration into Google+.

August, 2010 - Slide: Google bought this social gaming company just under a year ago, and little else has been heard on the topic, but it's interesting to note that the company has such a division under its big tent as Plus rolls out.

July, 2011 - Google+: It's been a while since such a limited closed beta has generated so much excitement. Google+ has the potential to bring together all the lessons learned from the aforementioned social adventures, not to mention integration of Google's many other recognized properties, not the least of which are Picasa, YouTube and Android. Then again, it also has the potential to become just another entry in this very long list.