The document summarizes plans for the STI Summit to be held in July 2011 in Riga, Latvia. The summit will be organized by STI Fellows for STI board members and junior staff. It will address challenges in semantic technologies like social semantics, linked data, and large-scale data management. Topics will include social networking applications using linked data and semantic services for mobile platforms. The 3-day agenda includes keynote speeches and sessions on these themes, with papers and discussions. Junior STI staff are requested to take notes at the sessions.