The web-based version of Google Reader is pretty good, but it can be nice to use a desktop app from time to time. On the Mac you would be hard-pressed to find a decent free Google Reader desktop app, but the newly released Cappuccino is exactly that. It is a rather complete Google Reader app that comes equipped with folder/group support and sharing features.
One thing you’ll find in Cappuccino that I haven’t seen in some of the other apps is the Growl configuration options. There is an option to turn on Growl notifications in the Settings menu, and then you can right-click on individual feeds to suppress Growl notifications from being displayed. That’s a really nice feature, and with it you’ll be able to ensure you only get notifications for the feeds that matter to you.
In some ways Cappuccino still feels a little rough around the edges, but considering it is both new and free I find it hard to complain about the little nuances. One thing that really stood out to me is the lack of an option to hide all feed items that you’ve already read. There is, however, the “unread” group that automatically gets populated with your unread items, but I’d like to be able to hide the read items in individual feeds as well.