The data consists of 2000 points of ASCII data, which you can find on ftp://ftp.esat.kuleuven.ac.be/pub/SISTA/degersem/workshop/datacomp.dat. (or download datacomp.txt locally here). Predict the next 200 points in the time-series, and send them (also in ASCII format) to Johan.Suykens@esat.kuleuven.ac.be. The submitted data will be evaluated and compared with respect to the mean squared error of the 200 predicted data points.
In order to find some good inspiration, interested participants may wish to consult the book `Time series prediction: forecasting the future and understanding the past' (Eds. A. Weigend & N. Gershenfeld - Addison Wesley, 1994) about a competition which was held at the Santa Fe institute.
Here's a plot of the data: