What hot cereals can I cook by just adding hot water? I eat instant oatmeal at my office desk every morning. I think I can also get instant grits and maybe cream of wheat or something, but what other hot cereals can I make by just adding boiling water? I don't like flavored stuff and I'm not looking for recipes, just a little variety in my admittedly very bland breakfasts.
If you try regular oats and like them, then you might try flaked/rolled barley, if you can find it. 

If you have refrigeration at work (or just bring in one-day's worth each morning), you could also add wheat germ (I can't imagine having a bowl-ful of it, but adding some to your oats would change them up.)

Wheetabix or shredded wheat can also be prepared with boiling water for a hot cereal.

Late recall - "Grape Nuts®" is another one that can be done hot, even if it normally isn't.