Need your help guys

I'm a CS major but to be honest know nothing about hacking, so thought I'd ask. Redirect me please if I'm wrong in posting it here.

Today, I got ~6 password retrieval requests in my inbox, but none of the passwords were actually changed.
A bit later I got an email from someone with a hushmail account saying to post his name on my facebook status and he would stop.
Updated my status with, no that I wouldn't because I think he's bluffing and doesn't really know my passwords.
Got another email saying not to fuck with him (apparently he knows me - I'm only friends with people I know on FB)

Now what do I do from here? I don't want to panic and change all my passwords because I don't know what technology is out there to track that kind of thing.

Also, I'm on a mac - so I doubt my keys are being logged or anything.

Thanks guys :)

If you're a loser macfag (meaning, a retarded 14yo who still lives with your patents) then all your passwords are the same and he can guess them easily. Learn to make real passwords and change them immediately.

Also, Greg, you assgoblin, don't use security questions that everybody can guess

By the way, I'm going to kill myself is this is actually the state of the art of what they teach you in college these days. Read your fucking SICP