For this first column of 2014, my predecessor as editor of this column, Marek Chrobak, graciously offered to write a contribution, discussing online aggregation problems. Readers might remember the TCP acknowledgement problem which has been studied in various papers. This survey considers generalizations of that problem, with emphasis on some (very) recent results. Thanks a lot to Marek for his contribution! I would like to invite more contributions to this column, be it surveys, conference reports, or technical articles related to online algorithms and competitive analysis. If you are considering becoming a guest writer, don't hesitate to mail me at rob.vanstee@le.ac.uk.