I havn't recieved my w-2 taxes; Could it be lost in the mail?

I had 2 jobs until the end of August 2008.. I quit them both and moved in September 2008. I changed my address with the post office in September 2008; I got my w-2 from my new job but still no w-2's from my other jobs.. I asked former corworkers of both places and they recieved theirs weeks ago... Could mine be completely lost in the mail? Would I have to go to the post office or am I to call corporate for both companys to see if they can resend? I just wanna get my taxes filed soon!