E-mail on a Mountain-Top
I noticed that GMail has an Offline feature in their “Labs” (experimental features that may change or not be completed). If you use GMail, you can enable by logging into your GMail account, clicking Settings, Labs, and then select to Enable the Offline feature. You can then click the Offline link in your inbox to switch to the offline mode.
This must be one of the biggest disadvantages to “online” e-mail programs (such as GMail, Yahoo! Mail, and so on) for a large number of people. If GMail is able to seemlessly integrate offline and online modes, they should be able to significantly increase the competitiveness of their e-mail.