This document discusses the use of Web 2.0 technologies on academic library websites in Southeast Asia. It analyzes 73 library websites across 11 countries and finds that only 36 (49%) incorporate Web 2.0. Facebook, blogs, and instant messaging are the most popular. Thailand has the highest adoption rate at 70.6% of sites, while Brunei and Cambodia have 0%. The document recommends libraries collaborate using blogs, wikis, Facebook, and chat to better engage and assist users. Limitations include a focus only on universities offering LIS programs and some non-English sites.