Turning Archive 2004
If you are making end grain boxes, you'll do well to learn the back hollowing technique, and the appropriate use of scrapers.
For end grain bowls and vases, I'd suggest looking into hook and ring tools.
The inside of an end-grain bowl is best cut from the center outward, from the bottom of the bowl out and up toward the rim (note that this is exactly the reverse of side-grain bowls). If the bowl is a shallow one, like a plate or platter, this is pretty easy -- drill at center to the desired depth, the hollow out from the center.
For deeper forms, however, the handle of the tool would have to pass through the rim and sides of the bowl to keep the bevel rubbing. This is where hook tools and ring tools really shine. Basically, they are bevel-rubbing tools that cut end grain very efficiently. They work like a small section of a bowl gouge cutting edge and supporting bevel that can be used on pretty deep forms without the handle of the tool getting in the way.
There are a few different hook tools available, and various ring tools like the Termite. Other variations, like the Exocet and the ProForme tools allow the user to adjust the depth of cut for more control. I'd advise looking into all these options and see which suits your needs best. If you search the archives, you may find reviews of these tools by Lyn Mangiamelli.