A DBUS like system for the internet (for message passing and multi casting events to registered handlers). It's like twitter, except for application to application/people communication.

You first visit the site and create a data structure and register it at the X service website. Then a application can send messages in that data structure to the X service. Other services/applications/websites/people can register (like following on twitter) various handlers on the X service. Any time the main application publishes a event to the X service, it's pushed out to all the listening handlers...

I guess when I write it down, doesn't so outlandish. Anyway, up for grabs.