Not really, sorry if I gave the impression I have some insight. But I have high confidence it will be temporary.
A plug for co.com and their web team....
I use CO.com every day and face very few problems. When I do (when maintenance is necessary, doing whatever web people do) it usually does not last long. Credit cards info gone, passengers list gone, no miles, no status anymore, etc. That usually indicates they are doing a little maintenance.
I've sent list of problem items to continental and always recieve a response. Even a few phone calls to get a better description of what is the issue at hand. No other website, airline or not has treated me this good. I don't believe I am the only one who has experienced good web help from CO.

Currently, as I mentioned I first noticed it at 2:30 pm et, I bought 5-7 tickets today until that point. Thereafter, using preview site I've bought 4 tickets.
Compared to other airline sites (bomb) co.com rocks.
Of course, if I was not able to log in since last night and was unable to buy tickets I'd be upset too

I think I send these comments over to the preview.continental.com Comments for Web Product Team as a compliment since it has been awhile since I have complimented them