There are a few human-computer interaction conference proceedings that I would recommend.

CHI is the biggest and most prestigious, but also most general. It will include a lot of irrelevant papers too. UIST is smaller and focuses on novel interactions. CSCW is about collaboration. IUI is about intelligent user interfaces. VLHCC publishes work on developer tools from a human perspective.

The easiest way to find these papers is through scholar.google.com. Just search for what topic you want, and it will try to find relevant research papers.

CHI, UIST, CSCW, and TEI are my personal favorite academic conferences for interactive media related design. (The paper posted by GP was published at CHI)