
A lot has happened in one year:
The popular Game AI blog AIGameDev.com nominated our CIG paper on Analyzing the Evolution of Social Groups in World of Warcraft as the most influential published research in 2010. Thanks to Alex for the nomination. Unfortunately we didn't win, maybe next year ;)

Our work on data mining in World of Warcraft is described in a featured article in Science (the article reports on the CIG conference held in Copenhagen a few weeks ago). You can download the article from this site.
You can find more details on our work on Wow in the following papers:
We recently developed another large-scale variant of Archetypal Analysis, see the following paper for details:
The code (also for the large-scale archetypal analysis variant) is available in the Python Matrix Factorization Module.
Our paper on Hierarchical Convex NMF for Clustering Massive Data got accepted at ACML 2010. The paper extends our last year's ICDM paper on Convex NMF to non-convex data distributions (acceptance rate is about 32%).

Our paper Yes We Can - Simplex Volume Maximization for Descriptive Web-Scale Matrix Factorization got accepted at CIKM 2010 as a short paper. Out of the 945 submissions, 127 (13.4%) were accepted as full papers and 169 (17.9%) as short papers.
Our CIG 2010 (IEEE Conference on Computational Intelligence and Games) paper on Analyzing the Evolution of Social Groups in World of Warcraft got accepted, acceptance rate is 49%.
At CIG, I will give a tutorial on Game Mining – Data Mining in Games, and together with people from KD and VSM we (Chistian Bauckhage, Olana Missura, Thomas Gaertner, and Kristian Kersting) organize a special session on Game Mining.
Our paper on convex non-negative matrix factorization in the wild has been selected as on of the best papers at the Int. Conf. on Data Mining 2009 (we won a possible publication in Knowledge and Information Systems (KAIS), nice :-)
Our ICDM 2009 paper on Convex Non-Negative Matrix Factorization in the Wild got accepted as a regular paper. Acceptance rate for regular papers is 8.9%. From 786 submissions 140 were selected for presentation, 70 as a regular paper and the remaining 70 as short papers.
Our ICSC 2009 paper on Archetypal Images in Large Photo Collections got accepted. Acceptance rate is 30%.