Which WSDL specification should I support?

Hello,

I am thinking about writing a WSDL stub generator for J2ME applications. It is desired to have interopt with .NET as well as Apache and other Web/App servers. Microsoft .NET supports WSDL 1.0/1.1 specification but not WSDL 2.0 specification. So, Question is which WSDL 1.0/1.1/2.0 specifications to support to maximize tools usefulness? My thinking is that maybe I should support only 1.1 and latter enhance tool to support 2.0 as it becomes widely inuse. What do you guys think?

Thanks,