Well, something is wrong with Gmail. Around 11:29 a.m. Pacific time, users started reporting a Gmail outage for both regular Gmail and Google Apps customers. Some users are reporting intermittent access or partial loading, but the disruption is still taking place as of 10 minutes later.
Update 11:45 a.m.: Many users are reporting that service has returned (and we're back online at RWW). Others still having trouble.
Update 11:52 a.m.: @Gmail just tweeted the all clear but quickly deleted the post.
Update 11:56 a.m.: Okay, now we're clear.
We've put together Twitter reports confirming the outage using Storify, and we'll update as we learn more about what went wrong.