Tilting at windmills for months, I've tried to get the media to pick up on the inexcusable failure of Gmail to have a simple timeout: don't use the Webmail client for an hour or so, and you have to log back in. This is a basic and vital protection for security and privacy; they should've designed the feature into Gmail from day one. Privacy zealots and the media missed this one big time.
Twice today I've been suddenly signed out of Gmail, zapped back to a login screen. Hmmmmm, have they implemented a timeout -- finally?