I don't know whether this has been mentioned in the forums, but I just saw a new feature from Google Reader, entitled Google Gears, which states:

"You can enable offline mode for Google Reader by installing Google Gears.
This is an early release of Google Gears (BETA). After installation, please pay attention to the warning dialogs and grant access only to websites that you trust.

More Information
Google Gears (BETA) is an open source browser extension that enables web applications to provide offline functionality using following JavaScript APIs:
Store and serve application resources locally
Store data locally in a fully-searchable relational database
Run asynchronous Javascript to improve application responsiveness
"

Anyone seeing this?