Updated for the year 2008 (and starting 09 Dec 2007)
Route of train: Poland, Czech Republic, Slovakia and Hungary
Options: Single sleeper, Double sleeper, Triple Sleeper, 4-bed couchettes, 6-bed couchettes, and seats
A single sleeper bed: 1st class railpass + EUR 77
No railpass? Then this service (ticket + reservation) costs EUR 193.
A bed in sleeper double: [2nd class or 1st class railpass] + EUR 33 per person
No railpass? Then this service (ticket + reservation) costs EUR 110 per person.
A bed in sleeper triple: [2nd class or 1st class railpass] + EUR 22 per person
No railpass? Then this service (ticket + reservation) costs EUR 99 per person.
A couchette in a 4-bed compartment: [2nd class or 1st class railpass] + EUR 20
No railpass? Then this service (ticket + reservation) costs EUR 97 per person.
A couchette in a 6-bed compartment: [2nd class or 1st class railpass] + EUR 13.40
No railpass? Then this service (ticket + reservation) costs EUR 91 per person.
Seats: 2nd class only. [2nd class or 1st class railpass] + EUR 4 per person. Reservations, even for seats, are compulsory.
No railpass? Then this service (ticket + reservation) costs EUR 81 per person.