Steven Troughton-Smith is the developer of Stacks. Stacks is a program (found in Cydia) which acts the same way as the Stacks option in Mac OS X, but then for your iPhone. He is now busy developing a project called Spaces. It is based on the SpringBoard Expose concept fom ‘Ocean Observations‘ and enables you to quickly see all your SpringBoard pages.
When this concept will be available is unclear, but Steven is working on it as we speak. Click on the picture on the left for a larger version.
The video below shows “SpringBoard Expose” from the company “Ocean Obseverations”:
The next video shows how Steven Troughton-Smith’s concept works: