So how can I ask for it?

More and more information is available both on our personal computers and on the Web, and the current search engines do a great job to make it accessible. Exploiting information structures as well as social information can make them still better. In this talk I will present some ongoing work at L3S addressing these challenges, done in the context of three projects focusing on personal information management and search (NEPOMUK and iSearch) as well as audio-visual and social search (PHAROS). Regarding information structures, I will talk about ongoing work aiming at querying large amounts of heterogeneous structured data without requiring detailed schema knowledge to formulate appropriate queries. Regarding social information, I will discuss first experiments on music recommendation and retrieval, using tags and user profiles from Last.fm