Top Ten Tips for Web Services Interoperability

* Watch out for Empty Arrays
* Use Package and Type Name Options when Generating Client Proxies
* Testing Generated Java Beans for Null
* Null Dates and Times are recognized by Java, but not by .NET
* Always use compareTo() when comparing dates/times
* Use Trace Tool to Investigate
* Add Option to Change Host and Port
* Ensure Document/Literal when generating Web Services
* Use Unit Tests to Test Interoperability
* Use XSD First

http://weblogs.asp.net/smguest/archive/2004/08/12/213659.aspx