From TechCrunch:
Until today, one of the biggest drawbacks of Gmail is that you could not go through your emails when you were offline. Today, that changes. Gmail is finally going offline. Google is rolling out a Google Gears version of Gmail that will be available to users starting today in Gmail Labs. (If you don’t see it, keep checking, the rollout to all users should be complete by the end of the week).
(HT: Andy Naseli)