Recently a customer of mine asked for a page with a list of K2 items, sortable by the custom fields and item titles. And I accepted the challenge. a first search on the "k2 list sort by extra fields" term returned a whopping number of 1,120,000+ results... and most of them where how to hack the core component to obtain a list sorted by a given extra field - which was not what I wanted. But, reading these pages an ideea sparkled - and in less, than a hour I had in place a solution wich was clean, no core code was hacked, and the table of results is freely sortable.