While snooping around developer Matt Mastracci uncovered a number of potential features from the Google+ source code. He discovered these features when scanning the source code to get an early access to the new circle sharing feature.
Here are some of the features found:
The first feature is pretty small and looks akin to Facebook's wall, letting users write on each other's profile without showing the post in the timelines of other users. Basically this looks to allow direct commenting on profiles rather than the roundabout current format of tagging a single user in a post.
This feature sounds like a version of Quora, letting you post questions and gather answers. Questions work like posts do today: you can mention other users, comment on them and share them. Functionality looks to include the ability to suggest questions to users, answer and comment on the answers of others.
Matt notes "it looks like the Google+ team is working on ensuring the product works on Google Apps domains. The message that notifies you that Google Experts has been enabled has a placeholder for the domain. I imagine that this might be currently running on the google.com hosted domain."
Google+ Privacy Wizard
Matt also found the start of a new profile privacy wizard. "With a bit of code wrangling, you can get it to pop up on your profile page. The Google+ team is obviously working on matching some of Facebook's more streamlined privacy controls."
This wizard gives users 4 simple options for showcasing information:
Google+ Voice Integration
Matt notes "it appears to give visitors an option to call you from the webpage without revealing your phone number (like the existing Google Voice widgets)." This uses Google Voice to hide phone numbers to visitors, while still give others the ability to make a call. Google Voice accounts are required for this type of functionality.