Geez, you people are more prescriptively anal than me. I agree with the spelling comments for the most part. Numbers/letters as words and misused apostrophes bother me. However, this whole "ending with a preposition" thing isn't so bad.
Churchill's Quote
Bust_Action, you say that as if to imply that people in the south are inferior or make more mistakes. You fail to understand that people from around the country make all sorts of gaffes. You assume that your dialect is the "correct" one and that everyone should conform to your standard. One of the most basic principles of linguistics is the fact that languages/dialects are equal.
As for 'who vs. whom', it's a case of language evolution. (
http://www.wsu.edu/~brians/errors/who.html)
Finally, if you want to read about some more common errors and non-errors, check out
http://www.wsu.edu/~brians/errors/index.html