They call it Bump.Com (no kidding!), and the idea is that you can key in a numberplate to an app and send the other owner a text or voice message. Or even leave a post on their Facebook page.
Bump founder Mitch Thrower suggests a number of ways by which the service could help motorists. Such as notifying a driver in front of you that they have a soft tyre, or that there's a parking warden heading towards a meter with a red flag up.
Or sending a suitably negative message to that driver who just cut you up.
Of course, there's also the possibility for more intimate networking, such as propositioning that blonde who just sped past in the Porsche. Or vice versa.
On a proactive level, the founder plans to use the system to offer services, such as preferential rates in participating parking garages whose video cameras pick up your registration as being a Bump member.
The system requires both cars to be subscribed to Bump.Com. In beta form, there are around 100,000 subscribers in the US. It goes fully public in May. With suitable smartphones, the other numberplate can be scanned and automatically checked to see if it's part of the network.
The fall of the last bastion of privacy? *sigh*
