The TI-83 was just announced a couple weeks ago -- don't blame yourself for being in the dark; my students stumbled on the announcement on the Web before I had a clue! I would call 1-899-TI-CARES to see about getting one. As I understand it they have very few to share, but they are lending them out to workshop folks so they can get a leg up. (I am doing some AP Stat workshops this summer, so I am blessed with a loaner.) I believe they will be over-the-counter ready in May or June or something like that. I have spent only about 2 hours with "mine", but I can see right away that it is the statistical cat's meow!