With Google+ almost two weeks into its test phase, conversation about this new social network service seems to be going in circles. Literally. That’s because Circles is the Google+ feature that users are generating the most buzz about. It’s Google’s answer to the problem of organizing your social graph online. If you’re not familiar with a social graph it’s a map of everyone you know and how they are related to you.

In my previous post, I talked about the limits on sizes of tightly-knit communities. These group limits are closely related to a number of interesting personal limits, and are often confused with them. Unlike the group limits, personal limits actually measure something different: the number of connections that an individual can hold. They're yet another thing that you must consider when thinking about communities of people. Personal Limits The Support Circle: This is the number of individuals that you seek advice, support, or help from in times of severe emotional or financial stress.