You might have an app already in mind that you plan to build and don't wish to reveal, so this is more of a feature and app request thread.
The last thing I want is to auto-post a G+ post on Facebook, and trigger an interesting conversation there that I don't participate in. And I don't want to turn G+ into a megaphone where I'm simply talking at people without enabling them to talk back. That's not a conversation.
Not for tech savvy but for regular people. A relative of mine has recently switched to an android phone and finds a real hassle to complete all contacts and categorize them (as in circles).
A well done contact manager could be of great value.
Also, twitter and posterous publishing to g+ would be great