Open Agoras of information are distributed environments of independent systems, where seeking for information is similar to real-life searching for material goods. Interaction with these systems may occur in several unconventional modalities, user behavior may be personalized and context-dependent, system reaction may be unpredictable, and the information produced as a result may also be personalized and context-dependent, negotiable and of uncertain origin or quality. This paper explores open Agoras of information and identifies some technical challenges that they raise.