Download: http://webtest.canoo.com/webtest/manual/Downloads.html
Install: http://webtest.canoo.com/webtest/manual/install.html
Data Driven WebTest: http://opensource.basehaus.com/webtest/screencasts/data-driven-webtest.htm
Maven Integration: http://mguillem.wordpress.com/2009/04/30/webtest-with-groovy-maven-and-eclipse/
WebTest vs Selenium (2007): http://mguillem.wordpress.com/2007/10/29/webtest-vs-selenium-webtest-wins-13-5/
