Visit Google Scholar - http://scholar.google.com
Google Scholar enables you to search specifically for scholarly literature, including peer-reviewed papers, theses, books, preprints, abstracts and technical reports from all broad areas of research. Use Google Scholar to find articles from a wide variety of academic publishers, professional societies, preprint repositories and universities, as well as scholarly articles available across the web.
For more info on what Scholar is visit http://scholar.google.com/scholar/about.html
Might be quite useful to hit upon technical topics in a better manner (other than Google Groups - http://groups.google.com/).