Well I'll be .... mine worked for the first time since November. It could have something to do with an email exchange I had with United.com that went along the lines of:

Me: I've got a problem and here are all the details. Could you please look into this and let me know when it will be fixed.

UAL: The site is temporarily experiencing difficulties.

Me: Excuse me? It hasn't been working since November and there is a long thread on Flyertalk showing that I am not alone. Can you please tell me when this will be fixed? I support United but FF's are generally not stupid and would rather deal with the truth than not be given information. We're trying to be on your side!

UAL: NOT MY FAULT - We haven't been given any information and there is no one here who has any.

Me: Then please send this email to someone who DOES have some information.

UAL: OK, I'll do that.

.... end of thread with UAL.COM .... BUT several days later, miraculously, I have been able to see my E-upgrades. Of course, it may be that I am on the road and lucked out with the ISP I am using, but it hasn't worked from other dial-in locations before. I'll report back when I get to my DSL at home. Maybe sending email to UAL.com helps!