At OOPSLA 2010 in Reno, Lennart and I were pleasantly surprised that our paper
Lennart C. L. Kats, Eelco Visser. The Spoofax language workbench: rules for declarative specification of languages and IDEs. In William R. Cook, Siobhán Clarke, Martin C. Rinard, editors, Proceedings of the 25th Annual ACM SIGPLAN Conference on Object-Oriented Programming, Systems, Languages, and Applications, OOPSLA 2010, October 17-21, 2010, Reno/Tahoe, Nevada, USA. pages 444-463, ACM, Reno/Tahoe, Nevada, 2010.
received the student paper award. Today (August 29, 2012) I found the official signed confirmation of the award in my pigeon hole at the university. Hurray!