The SIGGRAPH 2011 Technical Papers are now available online in the ACM Digital Library. There are updated links at http://www.siggraph.org/s2011/for_attendees/technical-papers .
New this year is a downloadable document called “Technical Papers First Pages”. This is a large (184 MB) PDF file containing the first pages of all Technical Papers presented at SIGGRAPH 2011.
Each first page has hyperlinks to additional information, including the full version in the ACM Digital Library. The idea is to allow quick scanning through all papers to get an overview of the conference program and to find subject material of most interest to you.