One of the points I'm making to the students in my lecture tomorrow is that the most important things to contribute to open source projects are questions and answers. Documentation is also really really important to healthy open source projects. To my mind, code is the last thing most open source projects need.
Good timing that yesterday someone added to the main soap4r wiki under "Howtos" a link to my blog entry back in March dealing with "SOAP + Basic Authentication in Ruby". The link is called "Basic SOAP Authentication".