Google Adds Offline Gmail Support
Offline Gmail is real, and we're really loving the sound of it. Granted, Google is still christening the feature an "experimental" one for now, but are you really surprised? After all, Gmail itself is still stickered as "Beta." At any rate, the service works just about like you'd expect, though the complexities behind the scenes are what makes this implementation great. Once the feature is activated in your account, you can simply visit Gmail.com while no active connection is present and "get to your mail just like you're used to."
Also of note, Google even thought to include a "flaky connection mode," which still relies on local cache data but attempts to synchronizes your mail with the server in the background. The overriding goal was to "provide nearly the same browser-based Gmail experience whether you're using the data cached on your computer or talking directly to the server."
Google will be rolling the service out to the aforementioned groups over the next little while, so not everyone will see the option to enable it right away. Keep an eye on your 'Settings' tab, though -- it should pop up soon. Below is a video to show you just how everything will work once it rolls to your inbox.