On Friday, The Official Google Docs Blog announced that all Google doc types (documents, spreadsheets, and presentations) can now be viewed offline. At this time, users can also edit word processing documents; that additional capability will be added over time for spreadsheets and presentations. The post also included a pointer to more information about Google Docs Offline: Overview: What is Google Docs Offline?
Of course, viewing and editing documents offline has been a capability of software for years. It's nice to see Google go retro and add some software flavor to its solution.