After the latest update (2.3.2) we received numerous serious bug reports from our customers. The issues included the Google Reader password not being saved, crashes after entering feed URLs and the unread counter not showing the correct number of unread articles after refreshing feeds.
We have investigated these issues and sent another update to Apple on the same day 2.3.2 was published. However, as you all know, it can take a little while for an update to get approved by Apple and it is not possible for us to go back to an earlier version. We therefore decided to remove NewsRack from sale until said bugfix update is available.
We apologize for any inconvenience this update caused for you and we hope that Apple makes the new version available soon.