EN
Thanks to Web 2.0 phenomena consumers have gained the ability to easily publish their opinions about products on the Web. Still, there is a lack of publications that would bring some systematization to the subject thus enabling a better understanding of the field and making further analysis and research easier. This article presents an analysis of twenty existing consumer review-enabled web portals in order to propose such systematization and provide a reference point for further research. Also, a short introduction to the problem of opinion summarization is presented.