Here are some useful links for those interested in the double bass - I use them frequently myself!
http://crescentbeachguitar.com
http://www.talkbass.com
http://www.fretwellbass.com/index.php
http://www.GollihurMusic.com/
http://www.metmusic.com
http://www.uptonbass.com
http://www.aesbass.com/
http://www.kaybass.com/
http://www.americanstandardbass.com/
http://bresque.studio205.net.au/
http://www.reubenradding.com/index2.html
http://www.bluegrassbassplace.com/
http://www.crescentbeachguitar.com
http://velvetstrings.com/eng/profilo.htm