I'd like to suggest the addition of the ability to exclude blog posts by category when creating a gallery of posts.
A site I'm developing for a client employs several separate blog instances.
One blog instance is for managing which employees are displayed on team pages. We can quickly add/remove team members simply by adding/changing/removing a category from their bio. We can slice and dice employees using categories like title or division. It's really quite handy.
Another blog I'm using on that same site is for