Twitter-client-like NSCollectionView implementation on OS X (>=10.6)?

I'm trying to subclass a NSCollectionView which imitate the behaviors of UITableView as Twitter does.

I've been trying to subclass/hack AMCollectionView, which “has a lot less features.” AMCollectionView used an immutable array to populate data into items, however, what I visioned is a twitter like table/list, whose data arrays is mutable, and it should support insertion and removal like UITableView开发者_如何学C does.

BTW, I'm still struggling with Key-Value Binding stuff. Any suggestion/solution/example code for NSCollectionView are appreciated.

Thank you.

Twitter released their twui libs.