I would love to have a way for members to easily be able to browse their various galleries while in the new post or new topic page and be able to select galleries they wish to include in the post.

Once you pick your galleries a thumbnail from each gallery is included in the post with a link to the complete gallery. This is much needed for photography oriented sites.

Good idea. You can do this when posting a new blog entry so I wouldn't think it too hard to implement.

And the same with IP.Content. Integration with Gallery

Good idea. :)