"Princess may issue either electronic air tickets, paper air tickets, or a combination of both for your specific flight itinerary. When your tickets are issued, the type of tickets will be included on the Air Ticket Receipt sent by Princess. If all required pre-cruise information has been received by Princess, and you are eligible to print your Princess eTicket boarding pass, you can expect to receive your paper air tickets and/or your Air Ticket Receipt, via fax/email/mail, approximately 30 days prior to departure."
it officially became '30 days prior to departure' exactly a week ago... should i be concerned that i have not received a receipt/tickets yet?
I wouldn't worry too much about the actual tickets yet, but your travel agent should be able to call the cruise line and get your flight information now.
I'd have them to do that, and call the airline they booked you with to check on your seating assignments. The cruise lines are not good with handling that side of the air, so you should deal with it yourself.