http://www.x-mini.com/about-us.aspx
http://www.instructables.com/pages/search/search.jsp?cx=partner-pub-1783560022203827%3Anpr2q7v5m6t&cof=FORID%3A11&ie=ISO-8859-1&q=portable+speaker
http://www.instructables.com/id/Make-Tiny-Portable-Speakers-Possibly-Better-Than-I/
http://www.instructables.com/id/Portable-speaker-in-a-CD-case/
http://thenextweb.com/socialmedia/2010/09/12/seven-important-social-media-trends-for-the-next-year/
http://www.reddit.com/search?q=portable+speaker&restrict_sr=off&sort=relevance
http://www.newegg.com/Store/SubCategory.aspx?SubCategory=362&name=MP3-MP4-Accessories
http://www.origaudio.com/products/rock-it
http://www.newegg.com/Store/SubCategory.aspx?SubCategory=362&name=MP3-MP4-Accessories
http://www.moneyweek.com/news-and-charts/economics/the-five-major-trends-reshaping-the-world-economy
http://www.slideshare.net/china2west/industrial-design-trends
http://electronics.howstuffworks.com/speaker.htm
www.physics.org/article-questions.asp?id=54
http://www.physics.org/explore-results-all.asp?currentpage=1&q=music
