IN what ways can a customer leverage WSUS for anything with these OS updates?
WSUS can only be used to push the 931836 OS updates for Win2003 SP1 and WinXP SP2. It cannot be modified to push other updates. If you are having difficulty seeing this update in WSUS, first make sure that updates with the classification of Update Rollups are selected under Options --> Synchronizaton Options. On that same page the appropriate products (OS versions) should be selected as well.
Once those are confirmed to be in place make sure the catalog has synchronized without error. With the synchronization successfully completed, make sure that updates with the classification of "Update Rollups" are not filtered out from the view under Updates --> View frame --> "Products and Classifications".