Back in May, Google axed the offline mode in Google Reader. I didn't use it that often, but it was a nice way to catch up on tech news while I made the 6-hour trek to Winnipeg from my home in the North. Thankfully, there's a new Google Chrome extension called FeedStore which brings back offline reading.
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.