Number of users currently checking a node I need to build a view "preferably a nodejs_view" that could count the number of logged in users that are currently checking a node.

Lets say we have 10 users currently checking node/123, I need to create a view that shows something like this:


node: 123
viewers: 10

node:124
viewers: 2


Is there any modules that could provide that? any idea how to build such thing?
viewers ,though this module is in drupal 6 but it can give you a good start.