Thought this would be a discussion about how pagination should work.

For the scroll pagination solution i think it would be best if it depended on UI-scroll, rather then reinventing the wheel. It's fun when everything is more modular so we can improve small bits instead.
It would work more as an optional enhancement drop-in "If it exist we will use it" kind of thing.

I also found this Multi level menu recently and I thought it would be cool to have a kind of optgroup thing working like that