onBeforeRender event? Is there an event or hook I can use with my plugin? I am looking for away to manipulate and record data about an entry before it is returned to the client. I could do this with AJAX after the page is rendered by the browser but I would prefer to do this on the server.

Is there an event or hook I can use to accomplish this?
The full list of events that Craft provides is documented here.

There currently isn't onBeforeRender or onRender events, but it is on our list with no particular ETA.  It gets tricky because it's difficult to distinguish between the main template and any other template that might happen to call TemplateService->render() (includes, etc.).