Has someone already received any money back?

If yes, please use my comment function to tell us more about it?
Has ESNTrain refunded the entire tickets costs?

Honestly, I haven't heard from anyone who already got the money back.

Jäggle, you should not forget that participants are making alternative travel plans.
For that the participants need the ticket money as soon as possible.
So, please hurry, Jäggle!!! You have the bank account details from most of us. A SEPA money transfer usually takes just 2 business days.

Oh, by the way. Do you guys know Nora Kleisli? She studies Business Information Technology (Wirtschaftsinformatik) at the University of Zürich. Well, she is the ESNTrain communication person. I've read this article, which was published on March 10th 2009.
http://edithschachinger.viennablog.at/2009/03/10/studenten-am-zug

In that article Nora Kleisli states:

„Heuer hatten wir allerdings eine angemessene Vorlaufzeit und der ESNtrain kommt definitiv auf Schiene.“

"This year we had enough time for organization and the ESNTrain is definitely going to be put on tracks"
Well, well Nora. Technically you were right. The ESNTrain was put on tracks in Bratislava. The problem was that the train was not moving.

Here is another statement:

„wenn ihr zu Ostern mitfahren wollt, macht schnell“, heißt es da, „manche Trips werden bald ausgebucht sein!“

"If you want to join ESNTrain during the Easter Break, you should hurry, because many nights on the ESNTrain are going to be fully booked very soon."

Apparently the ESNTrain team was desperate to get more money.
In my eyes it was so disreputable by Nora Keisli to try to lure more people to sign up for ESNTrain in March. As I stated many times in this blog. The ESNTrain team must have known of the EUR 400,000 deficit (and the inevitable cancellation) early in March.