With Google Gears, for example, you can view all of your Google Docs offline -- and even edit them (word processing docs only, spreadsheets and presentations are viewable but not editable). When you connect back to the internet, you will be able to sync the changes back to Google.
We're glad that Google has finally seen the light and released a version for our Safari-using counterparts. To make Google Gears work with Safari, you will need to download and install the Google Gears package for Mac OS X. Once installed, navigate to a "gears enabled" page, you will be able to use the Google Gears system. Remember, this is a beta and we've heard there might be issues if you've tweaked Safari in certain ways.
Oh, and there appears to be limited support for Fluid, which is nice.
[via the Apple blog]