This talk give an overview of the activities of SpudTV, which is a subproject within the EU FP7 project PetaMedia. In SpudTV, we developed methods for implicit tagging of multimedia data based on analysis of users' responses to the data. We focus mainly on the automatic assignment of affective tags based on EEG signals, peripheral physiological signals, and Multimedia Content Analysis. In the talk, several experiments are discussed, results presented and avenues for future work considered.