Possible Duplicates:
I can run faster than _____. (1) him (2) he?
“like I” or “like me”?

Which of these is correct and why?

I always assumed it followed the rule of "which would be correct if you inserted the verb", eg. Smarter than I am vs. Smarter than me am, in which case the former would obviously be correct.

But thinking more about it, I'm not sure...