Hello JohnK,

J> We are looking for arguments for using technologies that allows .NET
J> Framework and Java to interoperate on a point to point basis.

J> The two options are XML Web Services and .NET Remoting with using
J> third party runtimebridges likes Ja.NET and JNBridgePro.
J> .NET Remoting technology provides greater performance

Not always, comparing performance I'd say that WebServices beat Remoting
in number of cases
See there http://msdn2.microsoft.com/en-us/library/ms996381.aspx

J> then Web Services in a pure .NET Framework environment.

There is nothing common with WebServices. WS is the mean of interoperability,
not the specific MS technology.
See the WS on the w3c http://www.w3.org/2002/ws/

J> But Web Services provides more freedom from having to describe methods
explicitly.
J> I like to hear experience in using thes two interoperability
J> technologies.

I suggest u to use WebServices. It's reasonable choice for the interoperability
among components and in cross-platforms systems.
The weak of remoting is no support for declarative extention.

---
WBR,
Michael  Nemtsev :: blog: http://spaces.live.com/laflour

"At times one remains faithful to a cause only because its opponents do not
cease to be insipid." (c) Friedrich Nietzsche