OK, I have to chime in on the nauseous/nauseated debate. It is not grammatically incorrect to use "nauseous" to mean "nauseated." Yes, you can make technical arguments for why nauseous should not mean nauseated, but the fact its that nauseous has had that meaning, in addition to the "disgusting" meaning, for centuries and it is considered standard English. From dictionary.com:
The two literal senses of nauseous, “causing nausea” ( a nauseous smell ) and “affected with nausea” ( to feel nauseous ), appear in English at almost the same time in the early 17th century, and both senses are in standard use at the present time. Nauseous is more common than nauseated in the sense “affected with nausea,” despite recent objections by those who imagine the sense to be new. In the sense “causing nausea,” either literally or figuratively, nauseating has become more common than nauseous : a nauseating smell."
Incidentally, the same is true when it comes to "hopefully" being used to mean "I hope."