I sent in my fax a couple of weeks ago and united.com just showed me as PremEx as of last night (time to update the ol FT handle). It took so long I thought maybe they had rejected it. Then I realized that I've heard Oct 15th and after will go through next year - so maybe they were just holding on to it.
I'd confirm that I ended up status through Feb '05, but I'm not aware of any way to look up an expiration date online - so I'll just have to wait for the physical manifestations to arrive in the mail.