More on Google Gears
http://www.techmeme.com/070530/p127#a070530p127
Step 1 - Install Google Gears (as a Firefox add-in in my case). Windows, Mac and Linux Firefox are supported as is Internet Explorer. Safari support is promised soon according to the podcast interview mentioned above.
Step 2 - Click the offline button in Google Reader (next to the account name in the upper right corner of the window). Google Reader asks if you want to download content before going offline. Downloading 2000 items took only a couple of minutes over a WiFi connection.
Step 3 – Disconnect from the intertubes and read your RSS feeds as if you were still connected. When you reconnect to the network, Google Reader synchronizes your local changes (items read, shared and/or starred) with the server and updates new content from your subscription list. Seamless.
That's that simple !