“Gmail is having a systemwide outage affecting multiple countries, and a whole bunch of its 100 million users are screaming about it on Twitter. Around 20 million people visit Gmail each day, according to Comscore, and theyâ€™re all seeing the same message. The first outages were reported at about 2 pm PST, 44 minutes ago. The Gmail blog is silent on the outage, instead giving readers some useful tips on customizing web clips.”
It doesn’t seem to affect Google Apps, which is running fine for me. I can also see other people signed into GMail on my chat window.