Merging collections in Meteor

Question

Imagine you have multiple collections you want displayed on a single social news feed, for example Posts and Users (new signups). How would you rea

Answer 1

I came across this problem and I was wondering if a mixed solution would be better (or at least more efficient):

The solution proposed by David works great but, as he says, problems could arise when dealing with big collections.

What about keeping a local collection (just in the client), merge both collections into that local one when template is created and then register an observer (or maybe an observer for each remote collection) to keep the local collection up to date?