The state of SOAP

What’s the state of SOAP on rails?

This is what I can gather so far.

AWS doesn’t work with rails 2.1.

There are two forks of it one from datanoise and one here

There is something from ws02 which seems pretty new and possibly
doesn’t support WSDL.

I need to write some SOAP services. Which of the above is the most
baked and are there others I should be looking into.