I am looking for a replacement for NetNewsWire since its MobileMe syncing will be dropped (and Google Reader is not a consideration for me). Although Vienna lacks some of the features of NNW, it is serviceably clean and crisp. After a few days of testing I feel quite comfortable with it. Since it is open source, I may even try my hand at some hacking. Additionally, AppleScript support is perfectly adequate for accessing APIs like Twitter, tumblr, Instapaper, et al, and its database can presumably be rsync'd to other machines using launchd, and so on. All in all, a nice piece of software and worth your time for a few days test drive.

I hope the Vienna developers see the current direction of NNW as an opportunity for them to have the #2 reader people will be looking for.