PSOE: Needs completely new leadership from people who had no role in the last government. Which is unlikely at this point. So, if there is to be a true, non-communist party of the left in Spain, it will probably have to be formed by the Indignados movement.
Indignados will never form any sort of political party, that´s not the aim of the 15-M movement. Anyway some people who have been involved seat in the Parliament right now; this is the case of Alberto Garzón, a young economist member of ATTAC and IU (United Left) MP for Málaga.
PSOE needs a complete renewal, indeed, but this is not easy to achieve. In the last party`s Congress the contesting candidates were former ministers. Rubalcaba won; he is very competent but had a protagonic role (Deputy Prime Minister) with Zapatero and had posts with Felipe González. Sometimes I think that people in Spain is too enthusiastic throwing experienced politicians to the waste bin but, well, maybe Rubalcaba is not the best suited person for future challenges. Nowadays I can only regard the young Basque MP Eduardo Madina but perhaps it`s too soon for him.