Eucalyptus has currently been withdrawn from sale on the App Store by Apple. A more explanatory blog post will accompany its return - we're hard at work on the problem right now.
Just to avoid speculation, the situation is in no way connected to the problems we originally had when submitting Eucalyptus to Apple, and we're certain it will quickly be resolved. Don't worry, Eucalyptus will be back soon!
Thanks for your patience.
Update: If you would like to be notified when Eucalyptus is available again, just send an email to firstname.lastname@example.org and we'll let you know as soon as …