Stanford University inCircles their alum, as does the University of Southern California, and now the University of Michigan intends to inCirle their alumni as well.

These three university alumni associations are utlizing Affinity Engines' inCircle product which was developed at the computer science department at Stanford University and offers, among other features, a graphical representation of the connections between members that is user determined and searchable.

Affinity Engines describes their product as:

inCircle ™ — the product suite engineered to drive traffic to an affinity group such as a college alumni association – was developed within the computer science department at Stanford University with an emphasis on privacy, security, and integration with legacy systems.The proprietary software can be customized, although the  design is straightforward and easy to use. For example, a graphical image displays the connections between members, including their friends, friends-of-friends, and so on. Any member can search the graph and find people in their network who like to play golf, travel to Cuba, or work at Google.

An excellent context for the viral nature of YASNS.