Comcast Hates Google
Several sources around the web are reporting that Comcast has denied access to Google services including Gmail today. So if you have Comcast Internet and can’t check your email, you should give Comcast a call.
In the interim, if you substitute Google’s IP address for google.com, you can supposedly access your accounts:
http://184.108.40.206/mail (update: this only works in Firefox… apparently, IE will still try to render the domain name)