I just figured out you can pinch out the start screen and select a group of apps like you would an individual app and give that group a name. This goes a LONG way towards putting some organization around the start screen. MS should have made some default named groups to give people the hint.
I still think it is a shame MS doesn't do some of this out of the box. It would help preception a lot about the Start Screen since it would give parallels to the Start Menu concept.