FeedStore for Chrome lets you catch up on Google Reader news while offline
Just install the extension and you're ready to go. FeedStore adds an icon to your browser actions area and notifies you when new unread items arrive -- and stashes a copy you can read later. The reading interface is somewhat customizable, allowing you to choose a font and change the type size and line spacing. There's a dropdown for custom styles, though only the default shows for now (which is nice and clean) -- hopefully we'll see additional options added.
The downside, of course, is that a lot of sites offer truncated feeds. It would be nice if future FeedStore versions could pull the full post from source websites.
Install FeedStore for Google Chrome