Here's some recent changes we've made to Reader that we thought you'd like to know about:
Reading list ordering defaults: Your reading list can be sorted in different ways (by date or "automatically", which shows you more relevant items first). Additionally, it can have read items hidden or always visible. Until this week, the default combination was to sort automatically and show read items. Unfortunately, this meant that new items did not necessarily end up at the top, which was confusing to some users. We've therefore changed the defaults to sort by date and hide read items. If you prefer a different combination, these settings can be controlled by the links at the bottom of your reading list (pictured on the right).
Related subscriptions menu: When we made the recent improvements to reading by subscription or label, we neglected one use case, which was to see a list of subscriptions that have a particular label. Based on feedback from our users, we've added a new menu, "Related subscriptions," that shows up when selecting a label or a subscription that has labels.
Starring in the mobile interface: Our mobile interface is handy for when you're on the go, but occasionally you can come across an item that you would like to re-read when you're back at your computer. Until now, the mobile interface provided no way to flag an item so you could find it later. Now all items that you read have a "Add star" link at the bottom of the page, so you can easily add it to your starred items.
Bugfixes: As usual, with each release we try to polish Reader by fixing bugs here and there. Some recent ones that we've squashed include: better Safari support on the settings page and when marking items as read, better support for non-audio enclosures and better support for relative URLs in entries.
A lot of these changes were made in response to user feedback and bug reports. The best way to make yourself heard is to post in our discussion group.