Now I do know that "good" is an adjective and "well" is an adverb, and I would never say "I'm doing good at school," or The team played good yesterday. But ..... It drives me crazy when someone asks, "How are you?" and the reply is, "I am well". It may, or may not be grammatically correct (you can check the debate at "Grammar Girl" below), but it just sounds too highfalutin!
So, if you ask me how I've been, my reply will always be .... GOOD!
Here a little clip from 30 Rock about the use of "good".
Grammar faux pas on 30 Rock
If your interested in the "grammar debate" read all about it below.