Take this example:  
http://api.stackoverflow.com/0.9/questions/3165492;3182016/timeline

Would it not make sense to have the question_id as a parameter on each timeline object? It makes the timeline api pretty useless if you pass more than one question id does it not?

I would like to build a monitoring system for questions and batching up requests to the timeline api seemed the most sensible way to achieve this.