I've started work on a few new APIs for TWiST. The first is <ws>type. This API will make it a little easier to add simpleTypes.
To demonstrate the use of this new API, I have included another service called datetime. This service demonstrates code for validating the many XML-Schema date types. There is also a procedure/service for adding/subtracting a duration from a dateTime.
Services are available at: http://junom.com/ws/ and code at:
svn checkout http://twsdl.googlecode.com/svn/tags/release-0.8/ twsdl