Gary, Jack has linked to my tutorial on turning end grain boxes at Teknatool.
I would also recommend taking a look at Richard Raffan's video on Turning Boxes as well as the more recent version by Jimmy Clewes. Clewes' video shows tool position very clearly. I highly recommend both of his videos where he is turning boxes.
I use a variety of tools to hollow end grain. My favorite and the fastest is a Henry Taylor 1/2" detail gouge with a short grind. You can remove a lot of wood in a hurry and the shallow flute provides a lot of steel under the cutting edge so you can reach over the tool rest a long way before you get chatter.
As Dale said you can do the job with scrapers and I still use scrapers in some situations as a finishing tool. I think you will be happier with the finish if you use a gouge to cut with rather than a blunt tool to scrape with. I also have begun to use Hunter tools a lot. These are carbide tools with razor sharp cutters. I rough hollow with the gouge and then do all my finish cuts with the Hunter. I particularly like the Hunter on dense hardwoods like cocobolo, verawood, pau ferro, etc. There is a learning curve associated with a tool like this so practice on other woods before you go to expensive exotics.
My best advice is to start with relatively simple forms and master the techniques before you try complicated shapes. As I said practice on less expensive woods before you delve into expensive exotics.