[blahedo]

Bull. There is no credible linguist that will argue that sentence-ending prepositions are either invalid or even uncommon in English, whether spoken or written. There are some who prescribe this rule, due to nothing more than their personal aesthetic, and vilify those who violate it; but it is not a rule that competent speakers or writers of the language follow, and indeed those that propagate the so-called "rule" are typically unable to follow it consistently.

Furthermore, "the car am I driving in" is a complete red herring in this discussion; its syntactic structure is not parallel to that of the title of the post.

(My apologies to everyone else for feeding the trolls, but I can't stand to see prescriptions like this passed around as if legitimate.)

[danilocampos]

As long as we're indulging in English pedantry,

> There is no credible linguist that will argue...

who will argue ;)