I just received this response from Hotmail tech. It's very similar to the response that djmace received.
Hello Chris,
Thank you for contacting MSN Hotmail Technical Support. I am Denny, and I will be assisting you today.
I sincerely apologize for the delay in responding to your e-mail. Every message that Hotmail receives is very important and we normally respond to our customers within 24 Hours. Unfortunately, we have received an extremely high volume of e-mail messages recently and are working to catch up. I appreciate your patience as we resume our normal response time.
I understand that you many of your clients have informed you that they are unable to access their Hotmail account as they receive the error message Page cannot be displayed. I also gather that some of your clients were able to sign in using a proxy. I realize how inconvenient it could be. I sincerely apologize for the inconvenience caused.
Chris, many of our customers had reported that they are facing the similar issues. We have taken steps to resolve the issue that you reported, which mean the accounts should now be functioning the way you expect it to. If after receiving this message you are still having issues please clear your browsers temporary Internet files .
If for some reason you are still encountering issues please reply to let us know you still need our assistance and provide any additional details you feel may further assist in our investigation.
You are a valued customer at MSN and we look forward to providing you with consistent and effective service. If you have other concerns please feel free to write back.
Regards,
Denny
MSN Hotmail Technical Support
Can anyone confirm that your accounts are working properly now?
Is anyone still having the same problem?